As for where to start, use the internet. All the brands are on there where you can look @ floor plans and when you find something that you think will work then go to the dealers and do a walk thru. This will save a lot of time and energy just going from rig to rig. We have a 4 seasons trailer and we enjoy the fact it helps keep the rig cooler and have to run the AC less when the temp rises. Just be aware the sales people are there to get a rig out the door and not interested in what you want or like. JMHO