I'm gonna chime in with possible but only if you do all the work yourself and spend a lot of time at auctions and craigslist, while you're at is go bigger as well. Consider doing concrete block for the foundation walls rather then cement and you can save a lot of cement by only having to pour a thinner floor, my old garage was built all cement including footer and they cheaped out on the thickness, my floor split right down the middle, the neighbor's of the same construction company was spreading apart and taking the walls. Concrete block turns up cheap enough and frequently on craigslist.
Studs, ply, shingles and siding try the local auctions. I've seen 200sq ft of american made siding sell for 50.00 a box and shingles go for half price. Boxes of nails pop up on craigslist as well. Understand though that at best you will get the building for that 2k and only the building and it will take a lot of work. You will still need to save for electrical, insulation, and possibly even plywood for the walls, I'd do ply vs sheetrock due to the tools, wood, and activities that bang into the walls of a shop. Cost cutter could be wood on the lower half with sheetrock from 4' to the ceiling. Other thing is not minding odd sizes which mean getting things lined up ahead of time. I paid 20.00 for a brand new in the wrapping exterior insulated door. Thankfully it was the exact size I needed but at 80×28 would be useless excepting you built the doorframe for it knowing you had bay doors to move bigger objects in and out of. Windows can be the same way, abandon modern conventional sizes and dirt cheap name brand double and triple pane windows pop up at Grossmans for 25-35.00, same with skylights which I would put in any shop I built.
If you want fast, easy and people helping you could blow your budget on beer and lunch so good luck and good hunting.
