Send money to a business bank account. Over time take back more than you sent.

Obviously there is no easy answer to this. What type of financing, what type of businesses are you targeting. Then factor in sales, development, tech, accounting, servicing, underwriting, collections, marketing, investors, legal, etc etc. It takes a lot of capital to start a real MCA funder and become successful. If you want to avoid the mess of starting up an entire company, then I'd suggest looking into peer to peer lending.