Yes, the rates are much higher now, but if a deal works mathematically...do it.

Money isn't just mathematical, please realize that.

There are great blended rate calculators that can mathematically tell you whether to do a full refinance or use a HELOAN.  

You may get lucky and get a higher CoC return but it's mathematically impossible to squeeze more cash flow out of $600 rent than $900.

You're right that all the methods suggested are imperfect, but real estate investing is not a static mathematic equation, but rather an educated guess combined with creative thinking, flexible action, and a bit of luck.

The mathematics on a 30 year amortization will translate into lower offers.

There is almost no possibility to become landlord in CA lol except if investing in tertiary location.When I purchased in 2009 , I can pay it off 30yfrm in 2018 by having multiple rental , now it is almost impossible mathematically speaking.

@Jerry W I would be happy to show you how this works mathematically via web-meeting.

While this is mathematically the same thing for 90%+ of my clients, there is a difference, and I thought it worth noting.

I understand the mathematical equation... that's easy enough.