Black trailers are hotter'n hell - why I don't understand how they sell any in Texas but they do. It's at a decent price now for a 2016. A new 28' Continental Cargo at TrailerNut (not a recommendation, just once price location) is $7599. So watch the price and don't forget to add in the 10% buyers premium. For comparison, a full meal deal 28' with cabinets, LED, etc is around $28K. Which must be the oddball escape door. That's more $$ than our 34' custom with everything.
Our uninsulated 24' white trailer would be 100F+ on the inside walls in the sun. Black is hotter still. If you get any trailer, it pays to paint the roof with white "Mobile Coat" - that cuts 10~20F heat gain from the bare aluminum roof.