I was born and raised in Rochester, MN. My father was a Mayo neurologist. My first clinic visit was for diaper rash, my last, the 80th visit, was a for a general checkup after college graduation.
Yes, they have plenty of wheel chairs for you, and other than a few other companieslike IBM, the town was built around the Mayo Clinic, so all there are is motels and hotels, the most famous being the Kahler Hotel which has a underground walkway connecting to Mayo's main building. Several other hotels have these walkways also.
I should warn you that you will be sitting and waiting a lot, so bring your knitting or a good book.
You will be assigned a primary physician who directs and schedules all of your appointments: blood work, xrays, etc. When those are completed, you end up seeing him again, to hear the results. Plan on spending an entire week. (sorry) If you present with something tricky, your physician will consult with a team of appropriate specialists to arrive at a game plan for you.
You might have to travel to other Mayos buildings, so be prepared for that.
But Mayos is located in the heart of Rochester, so you'll have easy access to shops, restaurants, etc. Try Michaels restaurant. It used to be the best in town. And the Kahler Hotel has good food also. The drug store is located in the basement or lower level of the main clinic building.
And, yes, there are plenty of mortuaries in case you have something really serious. (a little dark humor)