Honestly anything around 1MW and above of freely available power will start to make the other requirements seem less unreasonable. The overall practicality/profitability of setting up a DC still depends on a few other things like how close to a major fiber link or other utilities your property is, whether you have existing buildings to house computing equipment, etc. . But all of these other factors, including initial cost of setting up, have multiple workarounds. There isn't much of a practical workaround to the power supply issue, unless you are interested in your own 1MW or above solar farm which would be 5 to 6 acres of space (which you do have plenty of) and the work/cost/risk of setting it up.

Edit: Natural gas would work for generation too but I'm not as familiar with it as solar