That's what barns are for. Which I have.
Prior to retiring I was self employed, paid by the job. If a specialty tool saved me time, I bought it. Being deductible helped.
We put an addition on 20 years ago, including converting half of our crawl space into a cellar. The contractor wanted $20K to finish the cellar (he dug it out, installed retaining wall, poured the floor, and stubbed in drains).
I finished it myself, with the help of friends along the way. I learned framing, insulating, walls, drop ceiling, plumbing, and wiring along the way. My cost was half the quote, and half of that was tools I still have. It's nice to have a large table saw, router + bench, compressor, numerous nail guns and other air tools, etc. .....
Yes, it took 18 months to complete, but it was fun!