My boyfriend finished uni recently and wanted to go travelling badly. And, he wanted me to come.
When the time came to book flights, I was getting better, but not fit enough for backpacking. So, we booked a cruise, which we went on in January.
For anyone with limited mobility, it's the best way to travel, I reckon. The service goes above and beyond, and every single person is looked after so well. You can even list yourself as a person with mobility limits. (And no, you don't need to provide medical evidence, or anything like that.)
I guess what I'm trying to say is, if you want to go on a holiday but can't handle the flights, look for a cruise leaving from your city. You won't regret it, and you might even have an excellent time. I certainly did.
It's good value for money too. Think about it, your money pays for food, accommodation and travel. I highly recommend it if you have CFS and you're looking for a way to go on holiday without busting your boiler.