Easy man.
Step 1 - Move to a state that has legal medical marijuana.
Step 2 - Go to some hydro shops and politely ask them if they can help you get in touch with the right people for a medial licence.
Step 3 - See the doctor they recommended and get your licence to consume and grow.
Step 4 - Grow good weed and sell it to dispensaries.
It will take 6 months to a year, but if you are looking for fast cash now...I dont know, minimum wage at McDonalds. Then save that money and move to a legal medical state.