My reply was as useful as the information presented. I will gladly do a MAnual J heat load Calc for you if you can't do one. Without one you my as well use the last method I gave you. I need wall construction, insulation values of floor, walls, and ceiling, the color of your siding and roof, which direction does it face please be exact, a room by rrom diagram with proper dimensions, are there any trees on your property, where are they located, are your windows double or single pane, argon or low e, where are they in your structure, your bin data city, is this unit an indoor unit or a package unit, how many people live in that little trailer.
Don't call me a prick till you get to know me, then you have to call me a prick to my face like everyone else.
Now who was the prick who orinally posted this request. The guy who wanted $500 worth of information for free, you are welcome to go buy the program for a few thousand dollars, if you look really hard you may even find a free one somewhere on this group, but you gotta try real hard. Although, I don't think that one will do trailers.
Good Luck Asshole