Old Bubblehead you are correct, and I will second his statement. Trailers are cheaper than new car, the enclosed trailers are very nice if outfitted inside to have a little work bench, and stuff like that if you are hobby person. Lots of people use them, but some drawbacks as stated, I will list a few more. If ham radio operator, all that stuff could have home in it, easier to mount antenna.
1. Trailer empty weight + toad weight, more than likely approaches the average 10K limit on towing behind MH.
2. Where do you put it when pulling into many, many RV parks, you will always need pull through if in "travel status" from one point to another.
3. If home do you have place to store it? Then their is the maintenance, cleaning, and the little things to consider.
4. The added length will further limit your road choice, and which turns you can safely navigate. I figure a minimum of 25 feet in length. Remember low bridges and the gross weight rating of those in back country if you have trailer.
5. Trailer will have to have at least one people door on front, so you can exit after you tie down car inside and you will have to tie down car.
6. Floor of trailer needs to be reinforced (unless specifically designed) for vehicle so it can support and haul weight of car.
7. Enclosed trailer is more aerodynamic than exposed model, but costs more, and heaver.
I considered trailer for a long while, even purchased one with GWVR of 10K, and then (farm equipment) and then thought about behind MH, something else to worry about. The limits above convinced me another jeep was the way to go.
One added thing many don't consider with jeep, it's a "real 4x4 vehicle", unlike many cars and trucks which claim it, but in effect is only a modified 4x3 system. If in bad place, jeep can get you out and back on the road in stuck situation. I had to pull friends "so called 4x4 jeep grand Cherokee out of the sand one time with mine. And, not to discount, places you will go, open up broad areas of country you can explore with a 4x4 vehicle, especially out west. But it will have to be a real 4x4.