Today I looked on another site pennymac to see the value it said and there was no information for the address of my property but when I added #2 to the address and it was able to come up with an estimate for my property.Do I need to be concerned that these apps are showing my property with the wrong address?

What is your estimated new construction cost of a SFH, or Duplex, or Triplex? 

$60k initial estimate, 71k final costs.

It's a good idea to get an estimate from a contractor to back up your deduction and keep everything transparent for the tenant.

#3 Would the 6k with labor and materials be a more accurate estimate?

Between now and then you can really crunch the numbers on rent vs. costs and decide how much negative you can stomach....at worst you still decide to sell in the spring and maybe it's a $40K loss instead of your current estimate. 

The appraised value is exactly what I estimated, as well as the market rent and expenses.

First is the Midwest, which by most estimates is the cheapest and most affordable part of the country.

From looking up on Glassdoor or Indeed I'd estimate their tech salaries to be $120,000 (on the low end) to $400,000+ (I didn't ask them their salaries, didn't want to be too nosey).

If there's a repair or capital expense like new water heater, might take a little more time with getting estimates.