1. make a rig

it doesnt have to be super expensive just get the most expensive GPU you can and the cheapest (COMPLETE) rig you can. now the way i did this my rig was complete so i recommend doing it the tried and tested way but i guess you can just do 1 voxel case and 1 gpu.

2. setup the pc

connect the cables, do the miner. just make sure everything is okie dokie

3. sell parts

just go crazy, drag them off the rig with left click and sell them (while dragging) via right click.

4. ALT+F4

im not joking, just alt+f4 out of the game. when you come back the cash from selling will still be in your pocket and everything you sold will keep being there

WARNING: i realized this after posting but once you make a rig to do this with, wait around 10 minutes for the game to save. otherwise it will dissapear

WARNING 2: this is not 100% consistent, i just lost 8 3090's for instance.