All the above comments are true. The steps above that all relate to more money. For example, more money can be spent on the frame. We have a Lifestyle and it uses a stacked box steel tube frame instead of the more common I-beam frame. We opted for a Residential refrigerator. More money. We opted for 8000 lb axles with disk brakes and H rated tires. More money. DW insisted on Full Body paint. Much more money.
Anything you buy will be a trade-off. You will go bonkers looking and trying to make a decision. Good Luck.