You don't have short-term maturity risk, and you don't have prepayment penalty risk (just has a 1% exit fee). 

The property will be sold upon completion.Rate:  12.05%Term:  13 months interest onlyARV:  $648,000Loan Amount:  $433,000Processing Fees:  $15,361.64 (3 pts plus processing fees)Escrow Charges:  $3,130.90Insurance/taxes:  $1,722.82Construction Holdback:  $498,361Cash to Close:  $84,762.36 In the OP, you said that the loan amount was $346k.

I understand that rents will go up over time and my mortgage payment will pay down the principal, but it seems like investing the $1.43mil into rental properties and/or a low fee US stock market fund may work out better for me. 

"pay me double of my expected assignment fee upfront., or in escrow and I will terminate it.

Worst case, those will probably cost you 15-20% in interest and fees.

I have not reviewed BAM's fees but it's likely based on their representation of UNDER 10% "skin in the game" that most of their "investment" is taken from fees deducted from the money gamblers place with them and counted as equity in the deal; this is a common practice in the syndication industry. 

Your management fee is way too low, especially if you're doing everything for the owner.

Some things come up that might be hidden which could be piping that needs to be changed out under a raised foundation or something like that for example. 

There is no PM fee after.

what are the laws in CO regarding unlicensed wholesalers tying up property advertising it and collecting a fee at closing is that even legal in that state. ???