I've been there, you've basically worked for free for several months and now the clients/partners want more, and likely because outside parties have filled their heads up with non comparable cost comparisons regarding quality of work, materials, licensed subs or just flat out lies.

If its a fsbo or a reduced services or flat fee listing buyers agents sometimes will not play ball.

I purchased a 3 flat with in unit washer and dryer and dishwasher and over-range microwaves.

I'm assuming that is side by side units and not one above and one below (which those tend to be described as two flats).But could it be that there is a roof leak above that bathroom? 

You don’t buy them Christmas gifts bake them cookies or go to their birthday parties .

Even with flat or slightly downward prices, the flipper believes he/she can get in and out in 3 months and come out just fine, but the seller can see no end to the potential drop (especially those still affected by PTSD from the last correction.) 

Some people are going to want an equity stake in the profits, some would be fine with a flat fee or a debt deal.Broad advice, keep it simple, and do it on a deal-by-deal basis (or at least, a "raise-by-braise" basis).

Looking to finance two flat purchasing as a rental. 

I have two identical 4 flats next to each other.

The other 4 plex owner carry was 18 years still owing at 4.75% and I got him to flat lower the rate to 4%!