You state that you intend to refinance in a year, so that [ $9200 - $170*12 = $7160 ] would just be poof, gone, never getting it back.When I plugged in "refundable" borrower paid single premium PMI, it spit back 3.79% / $19k.You can scale up or down from $500k to your correct loan amount... the numbers will differ, the concept and conclusion shouldn't really change.Also, can't use borrowed funds for down payment etc.

The cash flow and appreciation will come if you buy right from the beginning then you can enjoy cash flow later as you scale up and this is why I'm looking to do a cash out refinance and get my money back.

The network we have is vitally important to be able to scale and streamline the business. 

It seems to me that working with people to 'make deals' for an agreed split (like utilizing a buyer's agent, for e.g.) might prove more useful for 'scaling up' a duplicatable business in the long run, than simply working with people locally, or doing your own thing?

Is this something that comes with economies of scale - more properties = better discounts with insurance, etc?

The home is in Holly Hills (manufactured home) on land I own.

I have found that plumbing manufactures sell better stuff at plumber supply stores.  

I am well connected and have real estate development and rehab experience on a larger scale, but as far as what suits me individually I believe these are my best options. 

In other words, if I opted to make large scale improvements to my other properties (new roof, kitchen, bathrooms, ect) would these expenses help offset the profits of the flip? 

Multifamily and tax go along the lines of economies of scale.