I have done a ton of sheds. roll up doors are nice but are hard to seal compared to standard garage doors. If you have the room a door in the back is always nice so you can pull right through if you need too. Most of the sheds we do here have heat by wood stove. Most of them have coils in the floor. The others will usually get a furnace they found from a dealer who pulled it out of a house or anywhere they can find one. Instead of running tin duct work cause that can get expensive they will build it out of plywood and convert it into lp cause its cheaper then gas. like mentioned above if you keep the sun out the crete keeps it pretty cool so ac is not usually needed. You can always add a window unit later even if you just cut it into the wall somewhere. Remember the more lights the better just put them on a few switches so you dont have to use them all at once if not needed.
2015 stock for now LTZ
Sold: 05 lly cc, afe turbo inlet, blocker plate, efi dsp5 by duramax tuner, all on mod with HIDs high and low