15 year mortgage + recast?

[Josh Auerbach]

Hi All! My wife and I are in Vancouver, WA and are small time investors of SFRs and two Duplexes, totaling 10 units. I have decent W2 income and I plan to continue working for at least 5-10 years. With interest rates so low we have refinanced into several 15 year mortgages with the goal of quickly paying down/off a few properties. But, like everyone, we are also interested in increasing cash flow and ultimately want X amount of cash flow in 10 years so I can retire.

Last year we recast several of our 30 year mortgages and it was a pretty inexpensive way to increase our monthly cash flow. My question is if anyone has experience with getting a 15 year mortgage and then recasting some time later (since the mortgage principle is being paid down quickly)? For the more conservative investor, it seems like you can both pay down mortgages quickly but also increase cash flow along the way!

Thanks!