Long time reader, first time poster. A little background before I get to what I'm sure will be many questions by the time I'm done.
My son and I race karts in the the southeast, mostly in NC but starting to do some travelling to out of town events. We have a 6x12 enclosed that we use to haul 2 karts, tools, and all our gear. A few weeks ago we did our first overnight and it worked out pretty well. Got down to 35 degrees but we have a generator so we ran an oil heater and stayed warm enough. Also put a small fridge, microwave, and Keurig inside, then had a grill outside. The problem was that we have to leave the karts outside for us to fit in the trailer overnight.
So the plan is to pick up a (much) larger used enclosed (24') and start turning it into a toy hauler. A friend is upgrading and letting his old trailer go for a song because it needs some work. Going to check it out in a few hours, but I know about some of the issues in advance. Starting out I'll need to strip the wood off the walls to make some repairs to the studs/door frame (side door is wedged closed). While I have the walls stripped I figure that's the perfect time to put up some insulation, and that brings me to my first question. What do I want for wall insulation? It looks like everyone is using rigid foam board, but the local Lowe's has it in different R-factors. the R-1.9 is $7.98/sheet, R-3 is $14.48, and R-10 is $29. Obviously higher r factor is better, but as with most things in my life budget is a strong consideration. So it really comes down to how much do I NEED?
My main concern isn't the cold, we don't usually have super cold weather when we race. The bigger issue is the heat during the summer. The trailer has rooftop air, and I'd like to be able to keep it around 75 degrees. The catch is we are usually paddocked in a parking lot with no shade available. The trailer is red on one side and black on the other (sketchy painter disappeared in the middle of a repaint), it will be getting repainted white or silver to help with temps.
Thanks in advance, I look forward to chronicling the (very long term) build out into a toy hauler.
Scott