I had one of those rare epiphanies recently. If I moved the medium sized upright air compressor to the basement I could free up a tiny bit more space in the shop.
I'd need to run some piping for it though. If I went copper I'd use the expensive Oatey silver bearing solder because I cannot get a good sweat with the cheaper lead stuff (tried before to run some air in the basement for the little compressor - failed miserably, but I did successfully install a utility sink with no leaks ). I have a little copper on hand leftover from the failed attempt of basement air and the utility sink (I bought big contractor packs of fittings so I wouldn't need just one more to finish the task).
Iron might be a little easier to work with, but I'd need to buy everything fresh. Maybe if I bought extra I'd have an excuse to buy pipe clamps (quote of the day from my wife, "What is the deal with all these clamps lately?").
I suppose another option is just to get a couple 50' or 100' lines from Harbor Freight and be done with it.
I mostly use the compressor with the impact wrench for vehicle maintenance. Might get a pneumatic drill if I get into turning more and pick up one of those sanding pad sets.
What are the pros and cons of each possibility? And did I forget anything? On the off chance it matters, I'm using ARO style connectors.