Nothing was noted or said, other than make sure you have security in place.  

Can I secure the same loan for both scenarios—buying a new house from a contractor or refinancing in the BRRRR method?

I do this because sellers are going to offer 3% (they are in my market), and if I signed for less, I could not get the overage.To secure my buyers in this new environment, I made a 27-minute video going through the whole agreement and pointing out the things to beware of.

. - 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.

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

I also wanted to add a few security cameras outside and in the common area.

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..  

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

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.

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