You can fund your startup with non-accredited investors by using SEC registration exemptions from Reg D (504, 506b) or Regulation Crowdfunding under Title III, or an intra-state exemption based on Rule 147 or Rule 147A. Whichever you use, you need to think about how many investors you can manage, how to set expectations of non-accredited investors, and how having a lot of non-accredited investors might affect your ability to raise funding from angel investors or venture capital investors.