Enclosed car trailer questions - before I buy.

Many things to consider. How often use and distance of travel ? Round top or flat ? I always buy a round top because of rain/snow. Side drivers exit door. You would be glad you did. Yes on upgrade axles, the pair should be 10,000 total, 6 lug so you can run 16'' wheels and 10 ply tires. 16'' gives you a better range of GOOD tires. Look to spend in the $7,000 range.
Yes they hold their value.I paid $4500 for my first trailer.I was putting about 6,000 miles a year on it.20 years later I was offered the same amount from a fellow racer. My current trailer now is 10 years old. It is a Interstate. All this depends on my first question,and your budget.