I think you are all missing the OP's point.
He wants to start an exchange.
I think an exchange is way out of his league as you need many employees writing code and stuff.
Just to pay salaries for a year off hand I'd guess $500,000 minimum.
Rent, insurance, hardware, servers, advertising, legal, etc. add another $500,000 
Funding the platform in Cryptocurrency  I have no clue about.
Looks like way over one million USD to me.