That chicken-and-egg problem of not being able to get funding until you have a business, but not being able to build a business until you have funding? Solved. Get your funding at the idea stage, so you have the time and money to build.
Looking beyond Paintbrush? Try Pioneer for founder community and mentorship, Long to invest or get backed before VCs, and VenturesList 2.0 with 750+ funding resources. Also see GV for company-building help and Paygeon Capital for Startups for early capital.