The office is occupied by a long term very secure tenant and the 63,000 sq ft area had a tenant leave.

. - Accounting, not mentioned, but make sure you can confidently run the trust accounting and security deposit which is compliant with state code. - VAs, I don't think this is necessary for 30 doors, but depends on how much availability you have and how time consuming these properties will be.

Governor Gavin Newsom has signed AB 2801, a law requiring landlords to provide photo documentation when making security deposit deductions.

Go there and tarp the roof , turn off the water and secure the property .

Section 8 representatives will confirm the rent rate per house once a tenant is secured.

If they don't have a social security number, then you can't run a credit/criminal background check, and they shouldn't be approved.You can't verify their identity.

What is your favourite world wide market?

It's called Fraud by Inducement.OP does not understand how most wholesalers work.. its common knowledge that wholesalers do not use full disclosure to secure contracts not all but most..  

A 20' wide vacant 4-unit two story apartment building.

If this is a seller who merely doesn't want to accept an offer from a buyer who requires financing and you feel confident you can be approved for the loan, you can always write up the offer without a financing contingency and secure a loan before settlement.