Vortex12 wrote:

I'm making £5.00 to £8.00 per day in exchange for 500 watts of electricity

I think you're into 'schum mishtake schurely' territory ...

Using an online mining calculator, assuming you have two top spec 1070Ti
GPUs capable of 60MH/s together, that are free because you borrowed
them, and burning 500W of power at 14p/kWh, at current BTC difficulty
and reward rates, you're losing $2.40/day

https://99bitcoins.com/bitcoin-mining-calculator/?current_difficulty_factor=1590896927258&hash_rate =60&hash_rate_grade=MH%2Fs&btc_reward=12.5&btc_exc hange_rate=11646.1888&pool_fee=5&power_watts=500&p ower_cost=0.2&hardware_costs=0&action=99btc-bmc-calucalate

Nicehash also seems to have a 5% service fee for you selling your GPU to
them, plus a 0.0005 BTC fee for transferring from their wallet to your
wallet, then whatever fees it would cost you to buy hard pounds or
dollars from your wallet.