I don't know what I am going to do honestly. I think most likely I will do what's cheapest and keep what I have. 50 feet of heavy duty air hose on a hose reel.
PEX is rated for a lot of pressure , nothing could be easier or cheaper . All u need is the specialized tools to crimp the rings on the fittings , for air , I use two rings instead of one .
Air can leak out of a place that water wont.
Haver a plumber friend that will loan them to you for a few hrs ?
You have a choice of blue, red , or clearish white pipe----------I have never used it but there are threaded crimp fittings for it too. The fittings are the most expensive parts , and they aren`t terrible , unless u get into shark bite and stuff like that.