How did you progress your mining to a sizable level? 20+ miners

Going from one to two to three miners at home is a fairly simple process. The next step seems to be the hardest part though. Balancing overhead of rent, electric, isp, and misc costs at a level that allows you to continue growth (amount of miners) seems quite difficult.

Talked about this at length today with someone in a similar space. We’re not both idiots, so how did you guys do it?

At the moment quite maths leads me to believe you must possess somewhere around 10+ miners to make it worth it to not host somewhere else. That’s not an insignicant investment!

Any tips on making the next leap would be masssively appreciated.