I would visit http://www.fiberglassrv.com/
for more specifics on options.
Furnace is nice if you don't have or want to run a generator. Generators are finnicky in the cold, especially when they get older. A furnace will provide the best heat because it burns from the propane. If you have a generator or shore power, you can add a heater to your AC usually for about $60, and put the coil in yourself.
Linoleum is nicer for cleanliness, but most people take their boots off before entering anyways, it's really more about how you live.
Tv antenna is great for nighttime and when a freaking storm starts rolling in. We were in ocean city maryland a few year ago when we saw the weather getting bad. We followed to news and learned they were thinking of evacuating, which they did end up doing. Omni directional is all you need if you're near a big city or community, but a directional antenna is a must if you plan on camping in country areas.
Trailer brakes are always a good thing on anything over 1000lbs, and mandatory on most vehicles owners manuals for anything over 1000lbs. If you have a 3/4 ton pickup and towing a 13foot, you honestly probably don't need it. But for sure, a jeep probably won't stop the best with 2000lbs behind it. You will need a brake controller installed on your jeep as well. If you aren't handy like that, you can have any trailer or RV dealership install it for you.
Make sure you get the awning and hitch receiver option as well. Hitch reciever is nice for bikes, and extra cargo.