Look for a floorplan that can be used with a slideout retracted.
In case of a mechanical malfunction , you will be able to have use of your rv . If you’re not rv mechanical , looking for a non slide floorplan would be one less thing to worry about.
I would try to keep things as simple as possible. Try to find an rv that has a network of available help. Some rvs use Truma heating and water systems but not every dealer will or can repair Truma systems because they are not in the authorized dealer network.
The more electronic ‘bells n whistles’ the greater the risk to fail. Keep things simple till you learn what you’re doing.
Always have a plan in place for rv repair help. Know where mobile rv mechanics are in the area you are staying. If you are living in it, try to limit your down time for repairs.