Refinance analysis tool to refine underwriting

[Matthew Hoffman]

Let's say I'm looking at a deal today and want to embed my loan assumptions into the deal. Then I want to look at what a refi could look at various points of time in the future. For example, if I think rates will drop, I might like to look at scenarios where I refi at different rates at different periods of time to see how that changes my underwriting. The thought process is that if I like the deal today, I may love it a few years down the road where I can refi (whether I cash out or not) under better terms to reduce debt service.

I'm sure this is the kind of thing I could spend a lot of time trying to build in Excel -- am wondering if anyone can direct me to an existing tool that might help with this.