The best solutions to the problems are the simple ones, take GLT, the ref has to do zero until his wrist buzzes. simple, effective, brilliant,Think of it from another angle other than your own... Have you ever played or managed?!? Or have you always been a referee?
The new VAR, so far looks like a dogs dinner, every decision on everything will be challenged like US Football, what a mess!
As others have said, when there are a few to monitor this its probably workable, on your own, its going to cost Jobs at the CFAs when the cash dries up and games will be ruined by confusion and doubt. Imagine the mess if you get your timings wrong in not letting Players A or B back on the pitch bang on 10.00,and if something happens in the meantime!!! Managers or someone bothered will be timing the 10.00 for sure