I read an article on another site about compressors, etc ….I seem to remember that the ARB twin tank one was by FAR the most reliable, robust, etc....because heaps of those tested actually heat-seized, karked it, etc before they got a standard tyre (can't remember which one) to x or y pressure ...but ..it's about $1200..
Having said that...the note here about you not having to pump your tyres to 40psi immediately rings true….so a 1/2-3/4 way pump would do!...till you hit the servo...