Rebuilt entire home with full new custom floor plan adding a 2nd full bath and tripling size of kitchen opening out to back yard giving it more light throughout home.

Quote from @Chris Napierala: Bluetent, lodgify, littlehotelier, and others.I would build using a template site like one of these and then work on your own custom site as time allows, if necessary.

FINANCING - Your loan assumptions are should look more like this:  "75% LTV , 20 YR amortization, 5 YR term, 5.5% interest = monthly P&I of $1,367.18RENT -   Not sure where $6700/mo is coming from... 

I haven't looked into 4-Plex financing structures in a while and wanted to see if my assumptions are reasonable for a property we are underwriting.Does 25% down at 6% on a 30 yr amortization schedule work for a simple investment acquisition, or are there better options?

They do this for a few reasons, they have to much work, not sure if they can do the work as good as the sub or the #1 reason is that the customer has asked for super low cost and discounting.

Property maintenance, tenant reward programs and customer service are probably more directly related to lower turn over rates.

The whole story of performance is wrapped up into appreciation and reversion/sale assumptions. 

It is possible that I could wake up tomorrow in bizarro land and LA could turn into Detroit, we could hit an ice age and the great weather could go freezing, an Earthquake could put us underwater (literally), people in mass could decide that they prefer Omaha, all the tech companies, studios, and VCs could decide to move to Fargo, but I don't think so and I've got decades of data to back that up ... just in case my thesis is wrong, though, I always have multiple exit strategies to hedge against those kinds of risks and always watch and question assumptions.

To improve underwriting you must focus on the quality of your assumptions. 

I love the template you have set up, very informative support and tutorials and easy to customize.