I am going to recommend you get handles wide enough to use two hands on, at each end of the trunk. Maybe use a grab bar from the safety equipment in bathroom supplies. They come in metal colors. The handles most folks have are only one hand wide. Only let you use one hand per end, so that is a LOT of weight on your poor hand and arm to move them. The grab bar is also a larger diameter, more comfortable for your hands to hold on to, than those skinny type, fold down handles. I have some of these wider handles on one tack trunk, which came with it, are so much easier to use to move it around.
I don’t use my tack trunks to work out of, just storage of equipment. I really don"t use the trays and totes, though they appear well used before I got them. Use some kind of protective paint inside, perhaps enamel, which will clean up easier with spills of linement, shampoo, etc. I painted over the stains, but it took several coats to get that done, quit the bleed thru of spilled “blue paint” wound treatment in the wood.
Do NOT use mothballs inside a tack trunk. Well made, the trunk should seal to keep moths out. Once that stink gets in the wood, it is about impossible to get out. I am about to try Fabreeze on a recent trunk purchase. Nothing else has done much to kill the moth ball smell, but I have hopes for the Fabreeze, just hadn’t thought of trying it before. Airing it out, painting over with several coats, coffee sprinkled in to absorb, dryer sheets, washing with various cleaners, so far have not done a lot on that smell. I do have the stuff stored inside, in plastic bags, so they don’t smell too much when pulled out to use. Just the trunk itself, which is too bad because it is a lovely trunk and very roomy.