I live in a federal school environment, and as a result, we have free-constant electrical supply, which I was expecting to put to good use by mining bitcoin with.
Having good electricity is just one of the hurdles to mining. With Free electricity you will be able to achieve a lot, you have already skipped one hurdle, but there are other factors you need to consider and prepare for because there are always obstacles. School environments can have bad boys, your equipment can be stolen if you do not try to make sure that they are safe after purchasing them. Do not tell people that you are mining Bitcoins, do everything in secret.
The problem is even more than OP pictured, if you are getting money through mining and you are in the midst of boys, they will want to know, if they find out what you are running 24/7 they will hate and this will even make the dream of you leaving the premises happens faster.
You will be busted in no time, I was not even talking about this before, I was focusing on the electricity bill, and Bananington, there is nothing like free electricity, he is prepared to steal the electricity that someone is paying for, I am curious if OP knows the type of grid meter that's been used in the school.
If it's the old school meter it's better, because there is no measurement on the electricity consumption, only bills monthly, but if it's the new digital like the meter that people use today in different countries there will be problems fast, because they are loading money on the meter using the meter recharge card, once the loaded amount that was supposed to be managed within a month or two finished in 2 weeks, there must be some explanation.
The problem and unrest will start from there.
Modern electronic meters with SIM cards are not so common in many countries.
These meters are put on new houses and commercial real estate and the owner pays for it.
If the old electricity meter has an expiration date, then it will not be changed at the expense of the owner. And the energy company doesn't want to pay for it.