When I was gold farming, I paid 17m for a VPS and 6m for proxies.
I ran 5 accounts and bonds were like 2.5m each
So it cost me 12.5m in bonds, 17m for a VPS and 6m for proxies totaling 35.5m spent.
I created my own script from a method I found and was making 10m per account per a day so I was already profiting on the first day.
Find a good method and get a private script for it, and you can profit.