Since you are willing to open your own cloudmining services, i recommend that you share with others the mining rigs in the firm, no one will trust those services without proof of mining. Secondly, i think having a positive income - ROI - is a must, users will ask you about how much they need to wait for ROI, the cost of the contract, the maintenance fees...
You have to run it for a period so you can study your project before launching it.