I'm in one of these, it's part retirement complex, in beautiful grounds in the countryside. For over 50s, in rural east Midlands.
I rent as I don't want to buy anything (don't have the funds, don't want to tie up what funds I do have in a property, worry about selling on, don't want family to have to sort out anything when I'm gone).
It's actually perfect, most of us are still working. You don't have to be retired to be in one of these, although there are also others who are in their 70s/80s who aren't. My closest neighbours all go out to work, a couple of them in high powered jobs with lots of travelling, so the place is a perfect lock-up-and-go as well. I also work and have just recently taken on a job where I commute weekly but I keep this place on as it will be excellent when I retire.
Rent is extremely low because it's 50% less than local rents, with it being classed as a retirement complex. There are singles, couples etc., but no youngsters with children and no teenagers on bikes etc., which also makes it perfect for me. There is no ground rent to pay, no service charge and if anything goes wrong, I send an email and a handyman comes and sorts it out, for free. What is even better is that we pay a small amount each month and it covers all heating, lighting, water and a contribution towards council tax....while everyone else is worrying about their fuel and utilities bills, I'm not worried in the slightest.
Honestly, I couldn't rate it more highly.....