Some items can be changed by the factory or dealer...
Dining table and chairs instead of dinnette. Recliners instead of sofa or sectional or theater seats.
TV in spot of your choice.
You may be able to have some modifications made by the dealer or if you order from the factory. Or DIY...we added a desk/dining table setup and replaced the RV type recliners with two from LazyBoy. I added an electric fireplace in place of 3 drawers.
But ability to use when slides are in you'll need to find the right floorplan.
Good luck on your search.... you'll find something that will work.