The beauty of a portable A/C unit is that you don’t have to heft it into a window and block off a valuable source of fresh air for keeping paint fumes at bay. Instead, choose a model with a low profile that you can tuck under a table or against a wall when not in use — a model with casters for maximum maneuverability is ideal. Choose a high-powered unit that will condition at least 400 square feet of space and move it where you need it for maximum comfort as you work.
A board is considered “quarter-sawn” when the growth rings run, more or less, perpendicular to the face of the board. Quarter-sawn boards generally have straight grain and are less prone to shrinkage, compared to other boards. These factors don’t come into play with the 2x4s you use to frame a closet—but it does with the shelves and cabinetry you put into that closet; you want those boards to remain straight, flat and stable.

My shop consists of a 9×16 storage building, with 3 feet being used for actual storage! I have a table saw, 13″ planer, lathe, sliding mitre saw, home made router table, small compressor, 5′ 4 drawer bench with vice, table top drill press, 6″ jointer, band saw, shop vac, wall mounted hand tool storage, clamp rack, power tool storage, and no room to turn around! But I put out a few nice pieces! Recently built, a 48″ entry table from 100 yr old milled poplar, coffee table from the same re milled red oak barnwood, and a little triangle shaped corner table from the left over red oak, a 7′ x48″ bookcase from old poplar, a small wall mounted poplar book case, and am presently working on a queen sized bed with a mixture of 100 yr old oak and new kiln dried oak, with drawbored pegging using black walnut from a tree from my yard! I’ve also made several mallets that I find useful from my firewood pile using Cherry, ash, hickory and white and red oak. Building anything in 108 sq ft is a challenge, but patience determination, and decent sales will make it work! One good point is that nothing is out of reach! Except maybe the bathroom!
As the comic George Carlin might say, a shop is mostly just “a place to put your stuff.” The physical aspect of a shop is indeed simply a space of some kind — a garage, a barn, a teepee — that keeps the rain, rust, and robbers away and houses a collection of implements needed to saw, plane, slice, sand, and pound raw wood into useful objects. But just like the difference between a house and a home, what transforms a building full of tools into a comfortable workshop goes beyond the mere physical aspect.