Hello everyone and thank you in advance for your thoughts.

I am building a new rural home that requires extensive electrical investment.  The Electricity provider is building to me but I have a minimum usage rate of $350 per month for 60 months.  The current rate is $.119895/kWh which, after fees, comes to 2,735kWh per month.  I am paying for it whether I use the full amount or not.  I wont have any usage the first 8 months and then i'll use around 1,200kWh per month leaving a deficit of 1,535kWh unused.  To avoid this waste I am looking into mining BTC.

Sunk Electricity - 21k ($350/mo X 60/mo)
Miner cost ?
Internet Cost ($800 to begin 8 months earlier than planned)
Dedicated PC - $400

At the end of 60 months I would expect to have earned around .80 BTC so any price over $45k should be net positive.

Please point me in the right direction, poke holes in my plan and point out anything I am not thinking of.

Thank you in advance.