I'll answer those question that I can. On the floor, I just left the carpet that was factory installed. If I had to do the floor, I would use the OSB board. The 7/16 board would be sturdy enough. I did not insulate the floor in my trailer. The lighting would be best if you used 12V lighting. This you could run off of an auxilary battery, and have lights when ever you needed them. If you use the 110V lights you will need to plug into power before you can turn on the lights. I bought most of my lights from the Ebay site listed below. You can also get other "Camper" parts needed. My trailer came with a Boot Box against the front wall. I placed the water tank and pump in the box. This keeps the weight down low and at the front of the trailer. The water heater I have not installed. I do have a 2 Gal electric in the barn, but it is pretty big for what it does. A propane 6 Gal would be best if you want to add the propane tanks. These heat up fast and can keep up with a shower if needed. I installed a 20 Gal tank, and as I have not done any long term camping, that has been more than adaquate. No shower. I have an tent privy that I shower in. The cabinets were a combination. I built all of the frames and drawers, but I purchased the cabinet doors from Ebay. See attached site. I have seen a lot of people that use the dorm type refrigerators. Again you will need 110V power. Below are the site addresses and the one for my camper page. I hope that this helps. http://home.earthlink.net/~dheismann/ http://motors.listings.ebay.com/Other-Vehicle-Parts_RV-Trailer-Camper-Parts_W0QQfclZ3QQfromZR11QQsacatZ50067QQsocmdZListingItemList http://stores.ebay.com/DOORSANDPULLS_W0QQssPageNameZl2QQtZkm |