Over the last six months or so, I've been fixing up my garage. I added styrofoam panels to the aluminum garage door, installed a small A/C unit, and more than doubled my workbench space.
The styrofoam was cheap and only needed a small hand saw to cut. Cost about $30 to fill most of a 2-car door. Ran out of panels and need to buy a few more before I can call the job done. Made a BIG difference in heat intrusion.
Bought a new seal for bottom of door, but haven't installed yet. $15.
The A/C ($140) is very small - only 5k BTU - but I'm hoping will help keep the humidity down (rH in S AR runs around 80-100%).
Extended workbench along wall to corner and then elbowed so I have an L-shaped bench now. Legs are 4x4s that I salvaged from an old clothes line post. Frame is 2x6s and top is 2x10s and 2x12s (same basic construction as the old part). If I can pick it up, the bench will hold it.
About $135 for lumber, screws, brackets, stain, etc. Waiting for the stain/polyurethane to dry before I install peg board ($20 for about three times what I need) and hooks ($20).
Also added some screw-in hooks to the walls for hanging yard tools, extension cords, etc. $30 or so.
About $400 tied up in parts. Most of the work was done by a buddy for food, conversation, and the left over wood. My main job was to hold the boards while he cut.
Plan on adding some more insulation to the ceiling, but not in a big hurry.
Now I need to get rid of a lot of my junk. I have a Ford 9" rearend (including brake backing plates) out of a 1969 Gran Torino (open diff with, IIRC, 3.9-something gears) that I will sell real cheap or trade. An old IBM mainframe computer that is free-to-good-home. Four-drawer filing cabinet that's got a lot of surface rust and you wouldn't want in the house but the slides still work well and the inside is not rusted, f-t-g-h. All items are pickup in S AR only.