Disney offers three levels of employment.
Full-time - 40hrs or more a week
part-time (CR) - max 20hrs per week. (or 1040hrs per year) or else you get bumped into full time
Seasonal (CT) - There's a max, but not sure what it is, min is 1 week per year or every 6 months. You usually let your scheduler know when you want to work, or pick up extra available hours. Unless you state I will be available from nov-jan, you won't be scheduled regularly. This is what the snow birds do.
Most jobs are union positions in Disney, but you don't have to be part of the union, you just follow the rules. Like yearly pay increase, shop steward available if you need to write a witness statement. Seasonals to do not get to be part of the union, FT and PT have the option.
Disney has great benefits, for medical dental and vision. There's even an onsite clinic behind Epcot with doctors and a pharmacy. You do have to be FT or PT to get benefits, and the lowest med benefit is about 8$ per week, there's a free vision plan or 3$ for high vision (you get new frames and lenses every year rather than every two year and higher frame allowence). Same thing with dental, there's a more expensive HMO option, like 5$ or basic for like 3$. And then all the other things like life insurance, disability, flexible spending account, 401k's, stocks, that are optional.
The more popular grocery chain here is Publix, it started as a family business and mostly employee owned through stocks. I don't think there's a union. I'm sure there's some sort of medical benefits. Kari told me one of her managers went to work in the publix bakery as a manager for a lot more than what she was earning at Disney after 5 years.
I'm sure there's plenty of options available to you. Seems like lots of mom and pop places in Celebration too. But it is on the higher end to live there. The smaller of the houses, like 3 bedrooms, run in the 400-500,000 range. I don't know what property taxes are like, but every thing else you need like groceries and such are still pretty cheap and nearby to Celebration. I don't know if they still do, but years ago they used to give away a free electric car to new home owners. But if you're buying from some one else, maybe they'll throw that in with the deal. You'll see many of them around and special parking for them too.