@Samuel M.I have an excel spreadsheet that you can plug in principal payments and see how much interest you can save.

And after moving from excel, I also used rentredi, quickbook, avail, zillow rental manager, and a few others i cant remember. 

I just made an excel model and you're right! 

Propstream was too expensive for me, but for my needs and for any new investors I would say Propwire is excellent - and FREE.

Excellent, thank you Kevin.

This is an excellent opportunity in today’s market, and we will be able to provide you with more details in approximately one week.Just remember 90% of 0 is still zero.

That is excellent information.

I have limited knowledge of Sub To deals, despite Pace Morby's excellent efforts to make Sub To well know (Sorry, Pace, it's me, not you!) 

I recently joined BP, and I’m reviewing older questions:FHA Streamline Refinancing is an excellent option for lowering your monthly payments, especially with the potential rate reduction you're seeing.

Wayne - Perhaps you could share some of the analysis (in excel) to understand more about the numbers.