Where to stay in Edinburgh?

Ibis South Bridge is ideal, all the main sights easily walkable but remember Edinburgh is a hilly city and you will have to do a fair bit of up and down.there are bus stops almost outside the door if heading to other parts of the city. numerous places to eat within a stone throws distance.
Ibis is a fairly new building on the site of a very old building that burnt down over 15 years ago .
https://www.edinburghnews.scotsman.com/news/on-this-day-2002-cowgate-fire-rips-through-edinburgh-s-old-town-1-4634274

You don’t say what your budget is. We are staying at the Castleview B & B, it looks very nice and is centrally located.

Thanks for noticing that I forgot that detail. I'd like to keep it at or under $200 a night, if possible. BUT we could splurge on something special. We like unique and don't have to have all the luxury bells and whistles.

We stayed at "The Place" hotel on York Place during a Rick Steves tour last fall. It's on the eastern end of the city and about half a block from the tram stop. I thought it was quite nice and the hotel staff were very helpful. https://yorkplace-edinburgh.co.uk/

I would not consider York Place for someone who has to limit walking. It is just a 5-10 minute walk from the sights you are interested in, but it sounds as if that is 5-10 minutes that you would like to save your husband from having to walk.

For those interested in York Place area, I highly recommend the Premeir Inn York Place. Great price, right at the last stop of the tram from the airport, and the views from the upper floors over the harbor are fabulous.

Just got back from our RS Scotland tour , our hotel was very nice ....parliament house on Calton road

Thanks to all of you. I will check these out.

Google B+B Rothesay Place Edinburgh. It's really a hotel despite the name. We stayed there last year and it was very good. You can take a tram from the airport to a stop within walking distance of the facility. That same tram will go almost to the main train station and many of the places you'll want to see. If you decide to stay there ask for a room on the back overlooking Dean village. We can give specific directions if you decide to stay there, and also other info about Edinburgh.