Shop air dilemma

Three phase is not that hard or expensive to accomplish at home. There are a lot of three phase vfd’s that will run off the single phase 230 you probably have in your panel. I have built two rotary phase converters that cost me a total of $150. The 5hp is in the garage and 3hp in the basement. Cheap motors off CL and relays and other control parts from eBay. If you are really cheap you can use a rope pull to start them but I like the button start option. Beauty of a rotary converter is I can run multiple machines at same time as long as total hp is below the converter motor.
I have a 50hp rotary at my home shop, I bought my 37” wide belt sander from another shop and I got the rotary for $250 more. Weights as much as a 4 cylinder engine lol. A friend runs his whole cabinet shop on two separate phase converters, maybe $400 installed for both. He has 200 amp single phase there. I’m talking big machinery too. Very easy to do and well worth the little trouble. BTW one motor in my shop has been in service since 1907. Longevity