I have not used her but I am part of a Female Short term rental group and her name was suggested.

A duplex presented itself and through years of blogs, podcasts, research during the dark ages if anyone remembers Carlton Sheets, and I cunningly took advantage of the Sellers weak points and stole the deal at a great price.

Also is my plan too advantageous to buy a second property within the next 1.5 years after the first one given I can save enough for a down payment?

My goal is to have multiple rentals, but I'm not sure if there is some hidden advantage to financing several if I have one paid in full, or go all out and make minimum down payment on as many as possible at once. 

The other option would be to reduce your criteria to either a SFH, duplex, or triplex depending on the price, and still take advantage of the FHA loan.

The advantage with Conventional is you could get in with only 3% down and are not stuck with MI forever...Cheers!

My Q how do i use this to my advantage for negotiations and how can you resolve this? 

She was on board for a renovation and so we took advantage of purchase a house that wasn't move-in-ready.

She was on board for a renovation and so we took advantage of purchase a house that wasn't move-in-ready.

There are advantages to both.