We have looked into CCRCs extensively and fully intend to move to one in the next five to eight years (I'll be 65 this spring). Prices and such are all over the map and generally as with most things you get what you pay for. There are arrangements to pay a large entrance fee to lower the monthly cost, to straight rental, or a hybrid. Not every CCRC offers every option on financing. Some require the entrance fee for example and some are straight rental with no "buy-in" option available. Most seem to offer all three though.
My mother lived in one for 11 years and it worked out very well for her. She started out in independent living and was in assisted living the last six months of her life.
The one we're primarily considering has mostly single-family houses with one or two car garages ("cottages" they call them, although I think they're too big to be called "cottages") some town homes, and an apartment building with independent living units, assisted living, and dementia unit. That building also holds the dining room, swimming pool, and gym.
Pros: All the home ownership issues go away. Since we won't own the unit but will be renting (even with a large entrance fee that reduces the rent but does not eliminate it). So when the roof leaks, the dishwasher quits, etc. we just pick up the phone and they deal with the repair/replacement. I look at it this way: Roughly trading the house equity for the entrance fee gets our rental housing costs to about what it is now owning a house. But all the maintenance headaches belong to someone else! What's not to like about that? DW is NOT at all handy with household repair/maintenance so this is an important issue for us. The day will almost certainly come when even if I want to I may not be able to fix things.
A ready-made social group. Whether you fit that group is another issue, but my mother didn't have any problems with people. This is why we will probably go straight rental the first year - the higher expense buys us an easy exit if it turns out not to be what we thought. We do know of one couple who moved to a CCRC and wished they had done that but that's an exception. Most like the arrangement.
Cons: A major issue for some people, especially if leaving an inheritance is important, is that the entrance fee is generally not refundable after a period of years. The trend seems to be that they pro-rate that over about ten years so that if you leave after one year you get 90% back and after ten years there is no refund of it. For many people this is a deal-killer.
If you've paid the entrance fee you're pretty much locked in there unless you can afford to write it off after several years and decide you want to move.
The CCRC will take a close look at your finances to make sure you can be reasonably expected to pay your own way, but many have a provision that if your resources are exhausted by medical expenses they won't throw you out. This is well and good, but what about their balance sheet? A few (very few) CCRCs have run into financial issues and have had to cut back on services or charge for services formerly included in the monthly fee. So you'll want to take a close look at their finances as well.