FCO to Venice high speed train and money questions

Little confused about the dropping off bags in Rome? Perhaps you have a cruise scheduled?
When is this trip?
Your biggest risk factor is if your incoming plane is on time, and not canceled or delayed. Since Covid, there has been an increase in flight delays, labor strikes, etc. You can check Flight Aware for the dependability of your flight.
May I ask why you aren't just flying into Venice? ( I suspect it's price, as for some reason flying into Venice has become much more expensive than going into Rome or Milan.)
Wishing you a great trip. Safe travels!

hey hey rameseh
why are you leaving bags at airport (FCO), how many days and how much luggage? (pack lighter)
you're trying to save money on ATM fees but paying for storage. be careful with obtaining cash euros from an airport ATM machine, may not be ATM but a travelex that charges big fees. ATM may be in another terminal in airport (terminal 2 and you're in terminal 5) lots of walking and stress, jet lag.
no magic crystal ball or wand to say how long it will take, have no clue. flight be be late in arriving, long lines at immigration and ATM/Travelex machines, jet lag weary, money may run out of machine. do yourself a favor and buy some here in the states, i used wells fargo, got small denominations (5, 10, 20) about 200E, paid small fee of like $30 and was happy to have until we landed and could get to an ATM outside a bank. years ago we had 3 747"s land with hundreds of passengers wanting to stop to get euros, a total disaster. only 1 ATM up and running, other OUT OF ORDER and lines we so so so long!!! borrowed from my travel friend and got euros in rome and paid her back.
it is not worth the stress, worry and weariness to take a long train ride to venice. would have been easier to fly into venice (multi-city flight) and train back to rome without backtracking to rome plus adding cost of train tickets. too late now, just an option to check out next time. what are your dates to travel?
have a fabulous time with your family and enjoy
aloha

Rates are €10 or more for larger bags per 24-hour period.
https://www.adr.it/web/aeroporti-di-roma-en/pax-fco-baggage-services?

You are spending $10+ per bag, for how many days (?) , and you are concerned about a few dollars of ATM fees?

Do you have a specific need for a lot of cash? Most expenses can be paid by credit card.

IF your flight arrives on time you should have enough time to get the train.

Happy travels

thank you everyone...
To clarify - we are stopping at Rome and Venice for 10 days on route to Singapore (final destination) so the need to leave some luggage at FCO. we will be leaving a 4 bags at left luggage so we can travel within Rome and Venice with carry ons and maybe 1 luggage.
I am getting some Euros in US through BofA and was going to get some more as needed at an ATM in Rome/ Venice.
We were planning to use e-Gates at FCO per listed here to get through faster - https://www.adr.it/web/aeroporti-di-roma-en/e-gates
Any experience using the e-Gates?

Thanks

In the big picture, and given how little actual cash you will need (a couple hundred euro for four will go pretty far) forget about wasting your time seeking out a specific ATM to save 3 or 4 euro. If you will have some cash, just wait until you get to Venice and hit up the first ATM you see. Just be aware of DCC, that you need to do the transaction in euros, and reject any conversion.

As for time for the train, what you are doing works and is easy, and leaves plenty of time. You basically will be sitting in the dreary FCO train station for a couple hours. If cost was not an issue, you could have concluded your business at FCO, caught the first Leonardo Express to Termini, then the first fast train to Venice from there, there is one probably every half hour or so from Termini.

First of all, unless your arriving flight is critically late, you have plenty of time, and you may have a fair amount of time on your hands. When I arrived at FCO back in November, we may have used the E-gates - they were electronic scanners, there was a large bank of them, and we barely stopped walking as we went through and got our passports stamped. It can be a long walk from the arrival gate to immigration. Your wait for your baggage will most likely be longer.

In terms of:

You basically will be sitting in the dreary FCO train station for a couple hours

Shouldn't be necessary - there is quite good food service landside [before security] at FCO - on the mezzanine level above the check-in desks in both Terminals 1 and 3 - when I was there I found an outpost of Eataly there in Terminal 3 - not sure whether it still exists, but the other available options were fine. So you can go upstairs, grab a meal and hang out there.

it is not worth the stress, worry and weariness to take a long train ride to venice

What stress is involved riding a train? What worry - they are taking the Frecce direct from FCO - no changes. Get on the train at FCO, get off in Venice. And then what about the stress getting from the Venice airport to your lodging, especially if a water taxi isn't in your budget? If they're arriving on a non-stop, they're avoiding the stress of making a connection at a major European hub. And then weigh the comfort and legroom of a seat on a train vs. an airplane seat, plus the ability to get up and move around. Not the mention the scenery outside the window...