forget the post but some dude had a startup piping his 3090 to use via cloudflare tunnels for his ai saas making 5 figures a month off of his 1k gpu that handled the work load, I'd say he was doing it more then right.
There's a reason large companies are buying H100s and not 4090s. Despite what you guys think, serious ML work isn't done on the consumer cards for many reasons: FP16/FP8 TFLOPS, NVLINK, power consumption, physical space, etc.