i need experience cloud mining developer

i want to start up cloud mining plaform...

But can you explain than let start..
Ex : if we start a website ...

And I have 100 users who each have invested 10$

Now I have 1000$ for month

Now suppose I have to give them 12$ in a month

So after one month I need 1200$

I have 1000$

Now that extra 200$ will come from mining ?

Now to earn that 200$ how much it cost to me from your script..

......
i want to be sure want i want to embark on