They do the value based on cap rate or gross rent multiplier and they don’t have the 6 month requirement.

Note I even used a higher multiplier for the old value (which does reflect reality in San Diego market).Note the actual cash flow is not the initial cash flow but is the cash flow that is actually realized over the holding period of the property. 

What I’m worried about is if we will see some kind of multiplier effect here amongst the healthy sub 50 set.

Leverage can be very useful but also multiplies your risk. 

But, when they are multiplying by the 1000s in a unit attached to yours that you can't get to, it doesn't matter how much you treat your own or outside.

@David Ivy Yep that's true David, in the formula for that cell I took the ending hypothetical value of the home after 30 years with the assumed house price appreciation, then multiplied it by the 6% percent realtor fees and subtracted it along with the capital gains deduction and original value of house, then multiplied the result by 15% to determine capital gains tax.

Is it the full cash amount I depreciated or the amount of depreciation multiplied by my effective federal tax rate?

Or do I subtract taxes, insurance, exc from monthly rent before multiplying and dividing?

Multiplex has lots of responsibilities to manage multiple tenants and other related issues which are multiplied as well.

Regarding your question on how to calculate value, this size property is tough because many investors in this size still base price on a per unit basis, gross rent multiplier or other metric.