There are some reputable lenders that go down to 75k - just know below that 100k loan amount level that rates and cost may seem higher because of servicing and man power inputted into the deal still cost the same for lenders and brokers involved.

But how could I not be on edge when the entire deal, and our reputation, was hanging by a thread?

Once you've established yourself as a thought leader and built a solid reputation, it's time to unleash your investment opportunities upon your trusty investor list.

Confirm that the provider has a pristine reputation (e.g.

The answer is no one who is reputable.

Focus on your reputation, not the commission. 

Reputation  has its benefits.   

@Andres Rodriguez and @Srikant Puvvada Southern Impression Homes is a pretty reputable group from what I've heard, but I haven't interacted with them myself.

That comes down to the lender's reputation, skill, and willingness to get the deal done.

It’s not all about the money - it’s also about building a reputable business.