Alan, our trips (2adults late 60’s) are more in line with your budget. I could say they average around $15,000. I use an app to try and track all our spending. Here is an approximate cost for our last few trips:
Sicily - 2 weeks April 2022 $8,000
Spain - 3 weeks October 2022 $10,500
Paris/London - 3 weeks April 2023 - $10,800
14 night Norway cruise/ Netherlands - 3 weeks May 2024 - $17,960 (Norway not worth the expense)
Egypt/Jordan/Israel - 3 weeks March 2023 - $22,000 per couple (Private tour for 6 adults)
We are currently on an 8 week trip to Florence, Bologna, Croatia, Spain, and Portugal. So far we have spent or committed (hotels, tour guides, train, private driver, etc) a little over $17,000. We are in Madrid now, going to Galicia for a week, then Portugal for 2 weeks. We shall see how much more we spend.
Disclaimer, a month was spent in Croatia at our apartment. But we still had expenses such as day trips, rental car, dinners with family, etc.
These trips include premium economy airfare, nice hotels usually 4 stars, taxis to and from airport or train station, also taxis when tired, 1st class train tickets, private guided tours (when we travel with another couple, our usual travel buddies), rental car occasionally, and nice restaurants nothing too fancy. I deducted any money spent on souvenirs.
As you can see, some places are just more expensive or you need a guide. We just put a deposit down for a 3 week trip to Japan for 4 adults, no groups. The base tour without airfare or extras is $21,000 per couple. But, this is my top bucket list place, hence the splurge. Could we go cheaper, sure, but we don’t want to.
As you state, we are older and like our creature comforts, especially hotels where we can ask for more towels, and extra pillow, tickets to shows, and taxis.
We are also fortunate that our girls are married, have nice jobs, and have homes. They don’t need our money thank goodness. Could circumstances change and they need our help, yes, but we are forever optimistic. If that occurs, we will deal with it then. We saved all our working years for retirement travel and we are taking advantage of our reasonably good health and are on the go.
Good luck in your retirement and enjoy every trip you take, no matter the costs.