I am a creative guy with solutions that exceed expectations to the extent of disbelief.
I am currently willing to discuss in detail for free my first (applied for) utility patent in space thrust. I use solar sail spacecraft as the fuel for another spacecraft for 6-600 times improvement in Isp relative to 453s Isp rocket fuel at 19 mm/s^2. Sadly this isn't a good investment.
Patent#2 (provisional) is improved efficiency "linear" power supply