Might come as a shock
You can still pretty much do your own maintenance as long as your MO is happy to sign it off.
When you find your CAMO be sure that they are also happy for you to deal with this. Some CAMOs will only sign off the ARC when they are sure of the quality of work, usually by them or sister organisations
Our annual is usually around £2-3k, though they can be a lot higher than that.
The is an issue with Cessnas at the moment with the 'elderly aircraft inspection' that is starting to take some of them out. So if you do go down the Cessna route, get it well checked before committing.