I've been recently researching if I could replace American cloud providers with something like OVH or Hetzner (the latter I occasionally use for VPS) and there is no fucking chance. It's great that 37signals and DHH can do it, and I have no trouble believing they have saved money, but for situations in which I operate, both startup and enterprise environments but where devs are scarce and teams small, it's simply not realistic.
I moved my stuff to Hetzner. Obv I have no idea about your situation, but I found it fairly trivial for my stuff.
But I can't figure out how to replace GSuite.