You need to build relationships with corporations.

(we created a construction rescue program as a result of this) We  provide excellent incentives for our investors,including locking in long term debt at 3.75 % through our in-house financing program. 2 years free property management as well.

This is an excellent answer, thank you!

Also the reputation of customer relationship post sales, how they deal with call backs and warranties.

I hope you have a strong relationship and trust with this partner, or have some sort of lien against the property to protect your interest.  

I'd suggest finding the top sub-institutional brokers, building relationships with them, and letting them know what you're looking for.

I watched Dave Meyer's Market Intelligence Workshop on Demystifying Deal Analysis and found it very informative but I cannot find the TRI deep dive Excel spreadsheet.

Remember that having a good relationship with a lender is more important than a small difference in interest rate (In my opinion.)Cheers!

I've put together this excel document after reading Brandon Turners "The Book on Rental Property Investing".

@Patti Robertson that was excellent blog post.