Right now you are 24 years ahead of me, and I suspect you will have the energy to lengthen that gap as we age.  

Sooo... a few beams that the engineered lengthened to line up with the new footers in the basement DON'T exactly line up where they need too.....This really isn't the framers fault, This really isn't the lumber companies fault, This is one of those things that just happens sometimes.  

Your tenants poor history is reason ensough to evict and a partial payment only lengthens the amount of time you will be stuck with this issue and this poor quality tenant.In addition to my thoughts on my first response, you must also consider the fact that with the 7 year return on your investment from evicting the tenant and getting a higher rent, you are also at the same time increasing the value of your property through the rehab AND from the Inc e valuation approach.

Purchase the entire thing as investment and then lengthen your runway a little. 

This can be done by lengthening or shortening the number of years left to pay it off, changing your interest rate, and even potentially changing the balance of your current mortgage.

From the investment side of things I think if you're going to try to lengthen the amortization in order to increase cash flow, your maturity or balloon date becomes much more important.

Can I lengthen than to allow for more time?

I don’t resent these type of tenants; not as much as the corrupted legal system that hooks up with the hefty attorney fee which breeds them to take advantage of the generous time given that favored mostly to the tenants during the process, on top of the court backing up with so many such evictions locally that lengthen it to seems even forever that’s going to take.

If you lengthen the line in one spot, you will decrease the slope on the section you move unless you also lower the ENTIRE line downstream of where you did your work.

If that's the case I would need to raise the rents, get a cheaper interest rate, lengthen the loan, or put more money down. $500K down payment plus closing costs of 1.5% = $507.5K cash out of pocket$25K net cash flow per year after all operating expenses and debt service only yields a 5% Cash on Cash return.The 27.5 year deprecation helps with the internal rate of return and the potential appreciation is appealing for building equity.