You could use the current industry standard gross rent multiplier.

But an easier multiplier. 

Don't apartments get valued as a multiplier of rent, based on interest rate investment comps, correct me if I'm wrong?

There is some discoloration due to heat cycling (rainbow effect) but otherwise they are perfect.The multi ply is important for longevity.

I have been told that the rail connection would be a "multiplier" to the cost per sqft. 

Please multiply your effective tax rate to get the tax savings. let's say 150X30%= 45k in tax savings ) out in schedule E and what we owe in taxes comes out of there?

could've sworn i saw mortgage applications go off a cliff recently.i'm talking about paying your mortgage down faster so you can buy your next property faster - as in BRRRR investors who desire to multiply their portfolio. or maybe it's for someone nearing retirement age and want their primary residence to be free and clear in their golden years. it depends on the situation...if you have millions of dollars in real estate then i imagine you have rock solid tax planning, insurance, and entity structures that shield you from liability but hey they must do things different in Texas.whether any of this makes sense to you is inconsequential.

Things just multiplied from there..

Sorry, no data......from my view:If one earned money from which to "fix-flip"(unless you have a Gen Contractors lic, have side time... whatever), my opinion, [CAUTION] South Florida is nonsense clown act, (synthetic growth), Irma money is overbuilding / lifting a false R/E data market, and thanks to local tax multipliers are up 1-2 points; only adds to "comfort levels" if looking at SOUTH FL,  Monroe/Miami-Dade / Broward , etc, the East coast of the State has no industry to fund usual and customary lease terms.

Labor can be a little trickier, but i like to ask myself "how long would it take me to do this" and then multiply the labor hours by a labor rate.