Kind of what I am trying to mirror here digitally.

There are a lot of costs to cover before realizing net profit, which is often in the single digits for contractors (which, I presume, is the 3-5% figure that @Manolo D. refers to as I know of no business which can operate on a 3-5% markup).Your post is unclear in defining that the project "should cost about $100K"... when you say "cost", are you referring to the hard costs of the job (less overhead and profit) or what you think the net cost of the project should be to you?  

. - camera the sewer lines - get an electrician in there to check the wiring - appliance audit - how old, how much to replace, and any repairs done? 

This enjoy the double digit returns notes can offer without leverage, and keep your tax benefits associated with real estate. 

Is the fencing with keypad entry, cameras?

Or install security cameras and report them to the police.

All they need is your name and last 4 digits of your account number.  

They put together an entire securities filing for you, even set you up with a digital presence and an investor's portal to manage all the investor prospects and paperwork for an incredibly reasonable fee compared to the $15-$50K I've come across in the past.Also if all of your partners are active participants in the deal/holding company and not just silent investors, you may be able to forgo the necessity of a securities filing.  

The prior owner is currently installing additional lighting and security cameras.

I was thinking to hire someone to watch videos and implement them... like a techy high school student or a intern that is studying digital marketing...