Some strategies to get around are:1. leverage your current portfolio and buy in cash, increase value, and then refi2. buy Multi-family so your ratios aren't the main factor to lenders3. get in with a lender for high net worth individuals4.

While less than 10% of the mortgage industry offers 40-year mortgages, here's something to factor in: they often come in with a rate increase of 20-35 bps.Assume 35 bps.$300k mortgage at 7.25% (30-year): $2,046$300k mortgage at 7.6% (40-year): $1,996Technically, it lowers the monthly, but not by much once factoring in the rate adjustment.

They are mocking these up with interest only loans and factoring back in the tax deduction as if you qualified for the tax benefits of a real estate professional and factoring in the diminished first year property tax (since its not a full year).

Remember, historically only about 1/3 of LWO/CD buyers close on property, so odd's are you will be with a different finality.And you have to factor that odd's are it wouldn't come back after 3yrs list ready, that's just reality of things. 

You will also have to factor in the closing cost for the new loan.

I still need to do a deeper dive, but the ownership structure was one of the external factors that I was thinking about.  

Of course you have to factor in realtor and closing costs on top.

Heck, some people might even pay more for the 'cool factor' of living in a 'small home'....I'd give it a go since you're a veteran of this RE stuff.

@Dennis Bragg, how did you factor improvements and market appreciation into the buy-back price?

The biggest factors, from what I can tell, are age and rebuild cost.