>>716177563 (OP)Depends on how much money you have, obviously. Even with the highest-end consumer stuff you can't really go truly insane. Like if you build a 9950X3D + 5090 system it's not going to go into truly insane spending levels, obviously that's far from optimal value but it's not like you're spending 5 or 6 figures.
Now if you're thinking about buying extremely expensive shit like top-end Threadrippers with 4x enterprise GPUs then you'd better have a very good reason because a system like that can most certainly go into insanely expensive territory.