Marketing! It always comes down to proper marketing. You will need to distinguish yourself from lots of cloud mining ponzies and scam companies if you do plan to provide cloud option.
Also, I d suggest you get someone who s been in crypto for a long, long time and know his way around alts.

IMHO, mining the right coin and selling it at the best possible can triple your profits compared to the standard profit switching algos. Unless you plan to focus on BTC only.

Finally, I hope your mine WILL NOT be based in the UK. With UK electricity prices, you do not stand a change. You either need Island or Eastern Europe.