I am guessing you like the numbers you see in Strawberry Mansion and Norristown (Montco not Philly) but do you know for a fact that at those numbers, you can do a full gut rehab and be at a number that will allow you to profit, and along the way make some sizable mistakes especially if this is your first project . . . 

The 4-plex may be viable if zoning allows it but building another single family is probably not the move.

I believe Alexandria city allows it but portions of Fairfax county do not allow it. i would go option 1 personally. 

But I like to have single pours are larger surfaces like the floor, so we will have a truck deliver.In Iowa.

If the new money coming in just allows you to lose less money, then it's likely not worth the risk.

Once you know how the land is allowed to be used by City or County zoning, start working to a "highest and best use" mindset where you find out how the deal can be quickly turned into money by the end user.

This will allow you to get the sheriff involved immediately.If you are already past the notice period then you will probably have to follow whatever state laws are in place for the notification period and possibly the eviction process.

I think one of the older resorts that still do allow short-term (Airbnb rentals) would fit the bill.

Our negotiation approach focused on building rapport with the seller, allowing us to secure the property below market value.

We don't allow any "deal-making" in the forums, which includes advertising your services or properties, looking for partners, etc.