Tires:)....A lot of people figure that they are fine, because of the low mileage, but you should replace at about 7-8 year mark, no matter how good they look.
You mentioned the brakes. I just spend $2500 to have my completely replaced, because I had let the MH sit on the side of the house, without moving it, for 2 years! With the low mileage you are looking at, it may have been sitting for awhile too.
I also had the transmission serviced. (about $150) because even though I've got about the same mileage as you will have, and the manual typically goes on miles rather than years, I felt it was time.
Figure all belts and fluids. Batteries may or may not be very old, so check paperwork, and replace if over 5-6 years since they were replaced. They may still be OK, but again, that RV didn't get a lot of use, unless they took very short trips (which is possible).
I agree with Bill about checking for water damage, as well as any issues with the appliances (including the water pump).
Good Luck:)
