Install it first thing before/right after closing- pro- instant protection for everything to comecons- when they do electric, it'll be going on and off, the base will get moved around, I think it'll just trigger a ton of false alarms/will be non-functional half of the time. also will have to take sensors down for drywall and paint2.

Okay, numbers:Purchase Price: $47,200 cash (County Foreclosure Auction)Renovations/Holding Costs: $33,792 cashSale Price: $129,900Closing Costs: $14,378Total Profit: $34,630Renovations (Contracted):New RoofNew Windows2 New Electric Subpanels for A/CRenovations (DIY):Gutted the kitchen, opened up wall into Bedroom #1Relocated front doorFramed out closet in what was the living room to make it Master BedroomAdded a half bath to the laundry room area which became master en-suite (the home was permitted as a 1.5 bathrooms and when we got there there was only 1 bathroom so we added the half bath)Redid the kitchen entirelyCompletely redid the bathrooms, turning one into a 4-pieceNew floors throughout houseNew landscapingI estimated about $30k in repairs (after initial walk-through and having already purchased the property).

The house has updated plumbing, electric, roof, windows, and all that but does anyone see an issue with a buy and hold strategy on older homes? 

Also, with the cost of electricity now is it even worth trying to get the system up and running?

It's a municipal water authority.They lasted eight months and after they left,  didn't pay the electric, phone and water bills.

The owner pays for electricity for Radiant ceiling heat which adds to about 18K/year. 

In addition she took the electric stove(2 mo old) and the refrigerator.

That’s another reason I prefer side by side duplexes, so you have seperate water meters and gas and electric too and the tenants pay those bills.  

Floor joist are cracked, That wall also had electrical in it.

I have the bug!