There are different regions, price points, customs and expectations.

I would interview small custom home builder developers if you can get one to engage they will know all of this right off the top of their heads..

They realize the limitations in their model but I suspect many of their customers do not. 

I've been investing in the Macon, GA for awhile and while my local community bank in north GA has been very helpful, they feel like middle GA is outside of their regional customer base. 

Semi-custom, All wood, Shaker style cabinets that include  cover panels, fillers, crown molding, light-rail, toe kick, handles, garbage can pullout, soft close dampeners, etc.IN THE ATLANTA, GA AREA

Since our home is a custom rural property with no community services, it's an odd duck and we believe banks not loan on it. 

As a broker myself, the only thing I'd caution is (in most states) all fees and commissions must be paid to the broker/brokerage - agents cannot charge fees directly to their customer and could run afoul of state laws and brokerage policies by doing so (I am not licensed in Washington, so this is a generalization - not specific to your State).

Their customer service is pretty terrible but the prices are hard to beat.

Do what the local custom is and make it clear to the buyer what the net offer price is.

USAA > Navy Federal for mortgage customer service.