@Aaron White I've had mixed experience with contractors myself.

I really love this area of Houston because it's tranquil but right in the middle of everything and it a great mix of luxury homes and original, expansive ranch style homes still owned by the families that built them in 50's & 60's.

Denver is a great market to invest in as we have a great mix of cashflow and appreciation, you just have to get a little more creative than just purchase a single family home, and renting it as a single family. 

From my experience, diligent standards and screening is crucial in creating a strong tenant mix.

However, I would advise caution and ensure your target market has a diverse business mix and supply is not over saturated and it is not located in an area that will be subject to harsh potential business restrictions on the municipal or state level currently or potentially in the future.

Or you can spend 20 hours investing into relationships with “doers” in your market that will be able to guide you along the way.I don't think one way or the other is right, it's more likely a mix of both of them.

The following three basic models (and some of their extensions) have proved to be the most useful: Mixed Poisson processes, the Dirichlet model and Markovian models.Dynamic models for modeling competition, pricing and advertising strategiesThe majority of the models are so-called differential games or simpler models still written in terms of differential equations.

Lets mix the ideas together?

Now my goal is to have a mix of SFH and multi family and a couple vacation rentals that give me a total passive cash flow of at least $200,000 a year.

It has been our experience that duplexes tend to provide more cash flow and agh more appreciation, so it is nice to have a mix in your portfolio.