Wow! Abundance of great responses, and I thank you. The trailer is a 13 footer, currently has some old black covered Romex-type wiring in it that runs through an inside fuse box with a 15 amp fuse in it. This now powers about 3-4 outlets is all. There was a propane/AC fridge I got rid of. I got the idea about the 30 amp service and 10 gauge wire from an electrician who was working on my house and that I curb sided about the air conditioner--I assumed he was on target, but looks like not from these posts. For free advice, you all are golden! The air-conditioner will be nothing fancy, just an inexpensive 5000 btu one-room window AC. Also will want to run some kind of a water heater, a small AC fridge, probably a microwave, and a bunch of plugs. I like the idea of a box with inverter capabilities to charge the battery, to keep the 12v available for use. The AC/DC lamps in the thing are either going to need rewiring or replacement, if they still make such a beast as that, but I expect if they do, there are some awesome ones with LED, etc, for the 12v side.
