Help me build an EV bike

Hi. My mame is Davor and I am a young “entrepreneur“ to be, now just eager to learn. I have an idea and would like your help. Im building an EV bike out of my 50cm3 motor bike (supermoto/cross) AND i need around 3500$. The idea is to make an EV bike still using its gearbox. Its a conversion a little bit different than usual bike cinversions. This is my first build and i need financial help. Did the research and planned the whole thing, contacted parts supliers and my friend a mechanic. Sooo everything is ready all i need is some financial help for parts. I bought a used bike. Now i need an electric motor, charging module, throttle module, battery and some CNC machine work to make the shaft fit. The goal is to make better milage, more speed and consume less power. Thank you for all the help. Will be posting progress pictures. All of you have a nice day 😁

Ps. This build is done all by me. No online tutorials. No point in doing that 😁