let's talk about spending the money we don't have. a legitimate 2 stage compressor is the heart of any industrial plant. you pay and cry once and thenceforth have plenty of air.
dynabrade DA sanders among others used to be $125. back in the day and are now almost $200., 5" or 6" take your pick. without the electric motor they hold closer to the work for vastly improved feel. that is the deal with air tools. it takes vastly more power to compress air to run an air motor rather than use the electricity to run a tool motor in the first place. it's worth doing this to have small ergonomic tools that work quickly without all the bulk. as well as the improved feel the DA air sander works <very> quickly and would make easy work out of say feathering a soundboard.
i am aware of the deal with a lot of your shops and many don't have the juice as well as the cash to bring 220 electrons to bear. some of the small chinese compressors are very rugged including the porter cable pancake with contractors running multiple framing guns simultaneously and the little buggers going flat out for extended time. other pancakes you see will cost far more and bite the dust in short order. i have one of the porter cables for handy take to locations, a heavier dewalt oil compressor, and the ingersoll 5 hp 2 stage that sits piped in the corner of the wood shop. back to the hundred buck porter cable. you could run some hose to a slave air tank, anything you can find or adapt 20-60 gallons, and wind up with enough air to do instrument work. you could do the same with the compressor's 6 gallon tank, and pausing and being patient. i could gang up the 110v dewalt/emglo i already own with the porter cable pancake and have enough air to run my shop if the ingersoll needed service. redundancy can be your friend.