It kind of depends on what kind & size of truck you have, to tow what size of trailer, is a limiting factor for sure... Steel is cheaper than aluminum, but much heavier, aluminum is much lighter, better towing & fuel economy, but can bend or crack easier & is more expensive... I've had from a $1500 Big Tex 16' open trailer w/2x12 wood planks & dual axles, to a $100k fully outfitted 45' 2 car enclosed all aluminum Featherlite hauler/trailer w/lounge kitchenette & restroom/shower, some many others in between, enclosed & open... I personally think an enclosed trailer is the best way to go, it gives you added security, storage & weather protection over an open trailer, but more money, higher registration & insurance costs, more difficult to store & back in tight spots, but you can keep a car in it when needed & save some room in the garage... Air ride is always nice, A winch is always nice, A shade canopy is always nice, 12vt lighting at a minimum, A/C &/or a heater is always nice, if your going to dry camp or need to have any stuff like a refrigerator, microwave, battery charger & lights, etc., a adequate wattage generator is a must, fuel storage, batteries for in the pits 12vt lighting, storage space is always an issue with trailers, some nice aluminum boxes for open trailer or nice cabinets & shelfs, even a bench, for an enclosed trailer, a steel or aluminum floor is better than a wood floor & "can be" lighter too boot, a way to tie stuff down, with like, load bars, tie downs or D-Rings, hooks, ropes, bungee cords, ratchet & thumb straps etc., it's nice to have an air conditioned lounge/living, bathroom/shower & kitchenette areas, but you are getting into a totally different class of trailer & much higher cost & weight... Dual axles w/electric &/or hydraulic trailer brakes are a must at a minimum, a good quality hitch with the proper rating is an absolute must, a 5th wheel will tow & back up the best, but it take away the truck bed storage too, a goos-neck is the next best for towing, then a tag trailer last, get a trailer 4-6ft longer than what you need, the extra room will be well worth it, good ramps &/or dovetail deck is always nice, dovetail deck can create dragging issues in off camber or steep driveways roads etc... Trailers age like dogs 7yrs to 1, beware of buying used trailers, look for suspension issues & cracked frames, wiring issues... Trailers are kind of "you get what you pay for & no more", don't go cheap, you will regret it in the long run, but trailers depreciate in value very quickly, you will have a hard time getting your money back if your not satisfied, so plan on keeping it for a long time, buy something a little bigger than what you think you need, so you can grow into it, instead of growing out of it... Enough truck, power/torque, brakes & towing capacity,to haul what ever trailer you choose... Sorry no photos