Enclosed Trailer Help! Newb

[Try2paz]

Curious as to everyone's opinion's on trailers. I'm looking at moving from a Rollback trailer to an enclosed. I've got two cars both around the same weight 66 mustang / 67 nova. I really like TPD trailers as the ones I've seen have been top notch. I found a 20ft 2005 in Modesto that seems to be in great shape, it's half price of a new one. The guy wants 10k, new is 18k + tax / lic.

I spoke with TPD today and they said the 20ft trailers come with the 3500lb axels and have an overall rating of 7k. So if I factor 3000lb for the car, + 3250 for trailer that leaves me with 3-400lb for gear etc.

Is there any issue running right up to the 7k limit ? should I be worried, or should I continue to search for a 24ft?

Also i've been told to look at ATC Raven Plus? Any others I should keep a lookout for?