Don't be a quitter!
I haven't been a quitter since I was 15 years... I gave up driving air-cooled VWs daily finally in 2007 when I got a great deal on a newer car that I would have been stupid to pass up. I speak mostly facetiously, but in all honesty, it's hard for this hobby to be much fun when one can barely sustain it. That, and I live in a remote part of Oregon where nobody works on VWs, so all my options are purely mail-order (more expense).
I'm going to hedge my hunch on replacing the oil relief valves and springs... if the oil pressure doesn't improve after that, I'm at a complete loss. Yesterday, the gauge read like 25 to 30 PSI when the engine was cold (at idle) and dropped down to 10 to 15 at idle... as the engine warmed up, the pressure further dropped down to below 10, at which point the light came on.