I have had a couple Interstate brand trailers. They have been pretty nice. 7x14 is what I currently have. For my use it is good size. If I were hauling a Gator or similar, I would not try to skimp on height. 7000# would likely be adequate for your described needs. My buddy hauls 3 quads in his 8x16. When they get quads, coolers, tools, gear, etc loaded, he says it is maxxed out. He wishes he went 10000#.
I still would like to switch over to enclosed trailers for our mowing crew. I am going with Stealth 20' using 10000# axle if I do. Undecided on 7' or 8'. 7' doesn't leave much room inside moving around a 60" mower deck. That could be an issue with a 7' width on your UTV.
They sell a ton out of FL and southern states. One of my subcontractors used these one season and sold them. They did not hold up to daily use for mowers. Ramps were tweaked. Rivets popped loose. Lights were hit or miss. He said it was not worth the savings. He wished he spent the extra grand or so the first time.