The right way to start with this, if anyone cares, is to add instrumentation to existing SPV wallet apps to report back to home base how long they are running for, how much disk space / RAM they have, and possibly what kind of hardware.I strongly suspect that the vast majority of SPV wallets are not left running permanently, and run on laptops where battery life is at a premium. These people will never want to run full nodes.
Sorry. I don't think it will ever make sense to run full nodes on consumer hardware again. Our time is much better spent on optimising so it's cheaper for full node operators to run them on cheap virtualised servers.