Will they still work as well as a stand alone for 10 years if they are NOT hard wired and working off just the battery like just a regular battery-operated detector?

This is a regular purchase off market... first time home buyer for me.

I look at all the new homes each day (as well as 30, 60, 90, 120, 150, 180 day-old active snapshot) and compare them with the average neighborhood rents by bedroom count using about 1600 data points I regularly gather from Rentometer (yes, it is a tedious task!).  

So if your clients are regular buyers, he's probably not your guy.

IN my church we wear a lot of shiny suits and big hats so I *definitely* don't go in that but my hubs wears a regular business suit/sportcoat so that would be fine for him. 

Inspect regularly to protect your investment.

Justin - COC analysis included 10% for routine maintenance, 10% CAPEX, 10% vacancy and 10% property management.

My wife and I attend the Dallas REIA regularly.

What this means is that the only expenses that you include in "operating expenses" are those that occur regularly, like taxes, insurance, utilities, non-CapEx repairs and maintenance.  

The problem is that nothing I do on the side is really able to be verified like a regular job because it's typically cash.