Single Family based on lot sizes.  

Develop the vacation rental business and eventually added the event hosting portion.

You could always refi and only pull a portion of the equity out.

Or finding SF that I could wall off a portion of, and live in that, while renting out the bulk of the property.

If you are planning to rezone your property please check with local zoning restrictions on lot sizes to make sure that splitting your lot is allowable.When using the BRRRR method MOST loans on the "REFI" step will go off of a 12 months lease.

Thankfully I was able to secure a fair size loan from a private money lender, so we don’t have a lot of mortgages at this point - leaves us with some room for growth.  

For a project of this size, you will want a licensed contractor and likely will be required to use a licensed contractor. 

@Jinyu Shao judging by the size of building and apartments available sounds like you might be in Tudor City?  

What are the sizes of the lists?

Your rental half is reported on Schedule E. 1/2 of your housing expenses go against the rental (assuming the 2 units are equal size).