I've got a buddy that only runs his compressor when he wants to use it.
Having to wait for that ... what a pain!
I have a ball-valve shut-off on mine, so it stays at 125 PSI all the time. It runs very seldomly (if ever), and air is available any time I want it.
Think of air as "kinetic energy", and spend the time to find and repair any line leaks that you can. Doing so will save you money, time, and aggravation.
Spend the extra money on good quality couplers, plugs, teflon tape and hoses ... they'll pay for themselves over time.