You also need to factor in money for the mining infrastructure - somewhere to put the miners (they will be noisy), something to cool the miners (they will generate a huge amount of heat which cannot be underestimated) and in terms of the electric, you probably need somewhere business/industrial or you could hit a limit as to how much electricity you could get into the building - for example, in UK, a house normally has a maximum of 60Amps to 100amps supply fuse..  A business/industrial setup can have 300+ amps.

Also don't underestimate the amount of time to setup shelving/racks, to setup the miners, to get the software running - and then when the mine is up and running, dealing with rigs that become unresponsive and need rebooting..