Move to Glasgow (like Spire did). It's got a bunch of companies making cube sats & cube sat software & satellite data analysis.

Clyde Space will sell the bits to make a cubesat or even build it for you. https://www.aac-clyde.space/

Alba Orbital do the same thing at a smaller (& cheaper form factor): http://www.albaorbital.com/

Add a sensor that you can sell the data from. Make a deal to sell the data. Use the money / guarantee of the deal to raise money to fund the satellite development and launch.