I found if you have blueprint with infinity chest, you can place it and using pipette tool (Q) get infinity chests. You can also pick express loaders (they are already present as input and output belts) and pick electric energy interface. If you setup infinity chest with express loader (rotated to unload) directly to output belts and do this 16x, you can get easily get 19 200 000 000 coins/minute. This is 16 fully compressed belts with power armor mk2.

Other issue is if you want to maximize cash production, you need to start with producing satellites because it gives best profit per item crafted - sell initial armor (extract equipment first!), equipment, construction bots and buy assembler 3, set it to produce satellites and hand-feed it with resources for satellite. Because it gives best profit per item after some time you can easily get enough cash to setup 6 blue belts with ingredients to automate this production. This setup easily gets 1M/s. Then you only need to transition to producing power armor mk2 as they give best profit per item requested (13M/minute with 6 sets that consume 1 blue belt of blue circuits, 1 blue belts of steel and 1/4 of blue belt of mixed eff3 and speed3 modules each) and there is nothing more fun in this challenge