Having had to move many times, I understand having to re-establish the shop and setting them up. It sounds like the garage is the best option. THat is where I am, and the vehicles get to stay outside!
Temperature is a very important issue. While cold may not be so bad where you are, it is a killer here in the winter. It is very important to understand that many of the glues and paint we use (not CA) are temperature sensitive. Many glues and paints go bad if they freeze. Titebond for instance. Also, if the temps are low, even if you can handle it, the glues will not cure. Such as epoxy, especially laminating resin that has a long cure time. Such as when fiberglassing. I have begun to store many of my temp sensitive items in the house. At least through the winter.
The building board is one of my most important items. Mine is quite extravagant, but it helps me to build straight wings on the larger models I build. I start with a thick, solid core door. THen I put a Homosote top over the door. I have sanded the homosote flat thru a wide belt sander at the woodshop. Then on top of that I put a piece of 3/16" tempered glass. The addition of the glass cannot be understated, and has been a godsend to my building experience. The benefits are many, including protecting your plans, and have a perfectly clean flat surface to build from.