[lelanthran]

> [some process] is not a simple process by any means and requires batch processes that need demanding compute resources and is slow (i.e. takes many hours and runs over night).

Sounds like an ideal fit for on-prem/co-located systems. The big problem with on-prem is the egress costs from wherever all your data resides.

With on-prem, doubling your hardware doesn't double your ops expenses, so it makes sense, if you already have a server-room, to fill it to capacity.