I was going through the checklist PDF provided by Hayward city (https://www.hayward-ca.gov/services/permits/accessory-dwelling-unit) and one of the requirement says Are you the property owner and do you reside on the property?

We have a minimum 3 night stay and do not allow instant booking.

They aren’t looking to give you instant equity.

Minimal Rental UseThere's a special rule if you use a dwelling unit as a residence and rent it for fewer than 15 days.

My girlfriend and I bought our first house in March and that's when I began listening to the Bigger Pockets Podcast and instantly became hooked on learning about real estate investing.

I’m getting 50-60 text messages and 5-6 phone calls in a row if he does not receive an instant response from me.

Whomever owns the property/building may be able to get a vacant dwelling policy to get you to the closing. 

I can only speak in regards to Minneapolis, but a conversion fee is described by Minneapolis as a type of inspection fee: “When a dwelling is converted to rental property or has not had a license for the past 12 months, it must be inspected for compliance with the Housing Maintenance Code.

- Do you instantly jump into the eviction process?

Abandonment of the dwelling unit shall be deemed to have occurred when: [...](3)All persons entitled under a rental agreement to occupy the dwelling unit have been absent from the unit for a period of 32 days, and rent for that period is unpaid.Especially in class c/d, when they're gone, they're gone.