My electronic lock is on a 9V battery.

However, with the normal wear and tear/ usage of the two main entry doors to the units foyer area, we have had more than 5 service calls on the locks (for batteries, lock mechanism not functioning, etc.) and both front door Locks have had to be replaced once already and I am thinking it is time to use a different Door Lock method. 

The reason I estimate $120k in repairs is because I want to increase the ARV and increase rents, which brings me to my next point:A 4-unit renovated comp with the exact same specs showed up on the MLS today for ~$1,600,000!

@Michael VerniceThere's no single right or wrong answer to this other than IMO building a spec home is more involved than doing a flip. 

Hey Peter,What were the specs on the house when you bought it?

The Kidde Access Point is the best. https://www.amazon.com/Kidde-AccessPoint-001414-Co...Electronic locks are great, but you'll always want a spare in case the battery dies.

If I decide later to start a construction business (actively building and selling new spec houses), assuming this is taxed as ordinary income with social security, etc and treating the homes as inventory - if you build a house, then sell it, then spend that money building a second one, but don't sell it until the next year, then sell it, then build another, can you effectively push off the taxes as you are rolling the sale proceeds into new inventory costs / construction costs? 

Great job 809 credit score. 12 hits on criminal record the worst being battery with intent to cause physical harm (3 counts total) and Burglary of a Dwelling.

I would imagine 2-3 units could be built on the property depending on the specs and I would like to be able to start the build in the next year to two years. 

The small town rumor is that dude is the dope man and he has a laundry list of small-time drug and some more significant battery convictions already.