What do you recommend, coin operated or card? 

Now a coin op laundry seems attractive to me. 

@Lucas MoralesIf you have coin op laundry in the building as well make sure you have a machine that gives quarters as I have had people use the vending machine to get their quarters for laundry and you have to constantly restock it.Personally I would say it’s not worth it unless you are far from grocery / convenience store.

Same as crypto bros. 

Socialists - Communists only see one side of the coin.

Your ultimate goal is to refinance and pull out your equity so you'll get a killer interest rate. this way you can finance the rehab allowing you to hold onto more cash in the mean time. if you are quitting your job and won't have a steady source of income like you once did it's imporatnt to finance what you can and hold onto your coins lol.I say this as an agent and investor who uses hard money financing i think it will be your best bet . the ADU add is also easier than ever in 2021 with updated zoning and laws enacted here in Sacramento so you are on the right path brother. let me know if i can be of service.

It's always valuable to hear the other side of the coin.

Back in 1985 when I was single I sold my coin collection for the $7000 down I needed for a small $52,000 2-unit in Chicago's Wicker Park, through a realtor.  

Jack Miller, a now deceased investor and teacher coined the concept.

@Nicholas Patrick  so there you go both sides of the coin.... as a parent though I bet your parents want you to get the degree..