@Neil Patel Something seems off kilter given you have a vacancy issue in the Phoenix market.

The way it's worded on the IRS website, it very much seems to me to be optional. 

The home is in pretty bad condition and needs a-lot of work, Seeming to be a great opportunity for me to get my hands into the fix and flip game.

The result of 4 total units is the same as the lot split but it seems like it would be longer to go through the process of splitting the lot as opposed to just adding a primary SB9 unit which you can then add an ADU to.

It seems like interest rates are most common, so that’s what I’m leaning towards, but is the ball in my court regarding the terms or in the investor’s?

The answer seems very broad vs specific to your circumstances. 

It does seem like a little bit if an aggressive play, but I would have to get some more details on the deal.

Well @John Underwood seems to have a handle on this, but you might want to contact a CPA in your area to go over it if you are still concerned.I am not sure this will be helpful @Paulette Midgette but here is the directions on how to fill out the form - https://dor.sc.gov/forms-site/Forms/PT100_Inst.pdfIt really just says fill this out, but it might help a bit.

One thing I did notice is that almost everywhere seems to allow pets so that may be something to consider if you haven't yet.

I appreciate your input on a 2 bed/1 bath for long term rates, that does seem to have the best ROI and less risk overall!