Based on what you described, this sounds like a RESPA Section 8 violation. I am assuming that what you are describing as consumer home construction credit doesn't fall into any of the exceptions from coverage under RESPA. Paying for referrals for loans that are exempt from RESPA Section 8 coverage is the only way to run a referral program involving any form of compensation or exchange of a "thing of value".
_________________________
Opinions expressed are my own and do not reflect legal advice or the opinions of my employer.