I take advantage of Apple's no questions asked return policy for stuff like this:

Take my laptop in to be repaired, buy a brand new MBP at the same time. Load everything onto the new laptop using a time machine backup (takes about 2 hours), and use that while they're repairing my laptop.

When my laptop is fixed, I pick it up and return the one I bought at the same time for a full refund.

It's a bit of fuss making sure I keep the 'free-hire' laptop completely pristine, but it's fun to use a brand new machine every so often.

Not everyone has thousands of dollars sitting around to “rent” new apple hardware. Fine, if that’s your solution. I’ll stick to buying hardware that works.

>Not everyone has thousands of dollars sitting around to “rent” new apple hardware.

I imagine the vast majority of people using MBPs also have a credit card. I think you're imagining a problem here.

It could also be that this is an imaginary "solution" to a "real" problem.

I have done this in the past and its the way to go for sure.