I had to do this fairly recently to make krita-diffusion available for my friends and family who don't have a 3090ti laying around. Probably the simplest way wo

I had to do this fairly recently to make krita-diffusion available for my friends and family who don't have a 3090ti laying around. Probably the simplest way would be to run a local http service on your friend's M1 that is ssh tunneled to a server that you'll access over http. On the server you'll need to reverse-proxy the tunneled port to a public address and port. You make http requests to the shared server, those get proxied via the ssh tunnel to his machine, and the client on his machine could make the determination when/whether to run the workload.