I'm open to any suggestions and/or different approaches too.  

Some of the cheap units look great on paper, but the real numbers are very different.

Prefab and modular projects often require a different draw schedule than stick built homes.

How long it takes to be financially ready is different for everyone.

Despite the size difference, they each required about the same amount of time and effort on our part.

@Matt Randall, there are different loan option terms including 30 year fixed fully amortizing loans or 40 year fixed with 10 years of interest only and then 30 years fully amortizing. 

Start with the monthly nut that you need to cover: those are your numbers and they'll be different for everybody. 

Applicability of the tax or legal principles discussed in this material may differ substantially in individual situations.

They breach contract, I'm desperate trying to find a lawyer to sue the company.Below are the issues I have had with them: 1- They sold one my houses in Philadelphia for USD 146K but only paid me 94.975 – I authorized them to sell the house for a minimum of 94.975 but not to pay me less that what they sold it for2- They sold another house in Baltimore for USD 104.780 but only paid me 89,448.203- Only the difference between what houses were sold and what I received is USD 66,356.804- They deducted USD 5K from my rents in January without giving me the opportunity to do a full inspection in the house as agreed in contract.

I have suspicions they are not managing as effectively as you may believe and this may warrant a look at a different PM firm rather than piecing together the services and taking on additional responsibilities.