what is the builder fair fees other than a % of Tot cost ?

[Tarek Soliman]

HI BP community 

I have a land that I want to build several houses on it, and I am looking for a good a builder who I will going to have good sustainable long  term relationship. since I am building those houses for rent  and not my own dream house, so they must be as efficient as possible and quality for rent.  But the builders fees are determined by a percentage of the total cost, and I feel there is conflict of interest. I want to build with  lowest cost and good quality, but his fees build on the total cost. 

Question:

what are the good deals with the builders to replace the percentage of total cost? 

Pleas keep in mind that I want to keep him for the long term. and he is needs 

more projects. 

every suggestion is appreciated it