If a customer doesn't respect the fact that you are entitled to a fair profit for work completed, they'll just badger you and nickel and dime you on every project going forward.  

All that matters to me is that they treat my property and neighbors with respect.  

Earn respect and trust through action.

  :)I've always had respect for your post's, insight and experience.Thanks,-ron

Commercial financing is easier in a lot of respects than residential...the cash flow of the building is what matters, not so much the income of the borrower. 

Call the comps and speak with the property manager or experienced leasing agent and ask a ton of questions, but be respectful of their time as they don't have much for someone not renting a unit.  

Many members are experts in their respective fields related to real estate investing, whether that is real estate brokerage, wholesaling, flipping, buy and hold, lending, self-directed IRA and Solo 401k investing, or tax and legal guidance.There are some pretty cool discounts on various products and services offered as Perks to BP members that you might want to check out: https://www.biggerpockets.com/perks/pro

People respect honesty, and I believe they would be even more interested in working with you, because you are trust worthy. 

Pursue the Board options but move on and get the job finished with a respectable GC.

@Chris Mason Respectfully, not everything is math...there are all sorts of reasons that someone may be in a position to pay a higher rate, these "challenges" (DTI, Credit Score, BK, F, etc) can be overcome by going to person lender who can overlook these and a deal can be "handcrafted", secured against the collateral vs. fitting into some bank's guidelines.