Manufactured homes: Apply a discount to stick built when running numbers?

[John D.]

Right now I am typically looking for the 1.5% rule. My average property is a SFR that might cost $150k and rent for $2250 or so. I am finding properties that meet this rule, but they are pretty much all manufactured.

I was thinking about applying a discount factor to these homes, since they are harder to resell, harder to get loans on, loans are often and a lower LTV, and they will probably have higher maintenance costs long term (I don't have enough experience to say how much).

  Any thoughts here?  I'd like to start switching my mix of properties to include more stick built.  Perhaps I consider 1.4% rule on stick built, and force manufactured to hit 1.6% rule?  Even with this modification to my criteria I will probably end up with mostly manufactured.

   What would you recommend?  I'd love to build this decision using some math, but without truly understanding the increase in maintenance cost, and without understanding what that really does to appreciation and resale, it's hard.