This place has a lot of nice pretty inexpensive aluminum stuff for trailers.
There's also a Pit Posse on eBay, and sometimes you can do just a little better than the website. Two totally non related businesses, I guess also.
I use the Strapless Stands. With a broken wheel, you could still put the bike in the stand, but I don't know how that would work with the PitBull stand. The Nice Raxx are nice, but they only really work on PitBull stands or ones that have copied them.
If you're gonna paint the walls, use a semi-gloss mildew proof bathroom paint. They are usually self priming and the glossy part usually doesn't pick up too much from dirty hands, or it can at least be washed off. I like to use some kind of wood deck sealer on the floor. Yeah, a little grit can be bought and put into that so that you don't slip when the water rains into the trailer.
When I put big stuff like cabinets in a trailer that has wall studs, I usually remove an exterior screw, then drill through completely from that hole. Then I use a bolt from the outside to secure the item on the inside with a washer/locknut or some kind of other fastener.
And, yeah, getting things off the floor is great. Anything that helps you do that is a bonus.
Also, don't forget, the weight bias should be toward the front of the trailer to maintain 10% of the overall weight on the tongue. Additionally, as stuff gets moved out away from the vehicle's hitch and behind the trailer's axle, it can help you get wobbles