We went with a M2 Studio with maxed out RAM because we simply cannot get reliable GPU availability with cloud providers and for $6000 (with tax) we can have the equivalent VRAM of ~2 80GB GPUs instead of paying $5/hr for the pleasure.
Did the math and assuming 100% util and equal performance (which is certainly not the case) payback on your Mac is 9 months...
4x NVIDIA A100 at lamda labs is $4.40 an hour and I really have not had an issue getting them.
https://www.reddit.com/r/LocalLLaMA/comments/16o4ka8/running...
OP implied that there were workloads where it out competes renting in terms of cost. Was hoping it was true for something than a single user interactive session (which can be done a lot cheaper)