Since exits are limited and risk is still high, your accelerator for "Mittelstands" will end up looking like a traditional financing vehicle, providing loan funds in return for profit or revenue share, or some other earnings distribution. In which case it will look like a high-interest loan. You'll find yourself competing with all the alternative financing and "fintech" companies ranging from Stripe Capital to Paypal financing to local bank financing. I'm not sure the accelerator model really works here given the exits and risk.