At first glance, there is cosmetic work I'd want to do, but nothing crazy, just painting interior and exterior and some yard work. 

Treated for bugs, replaced the interior and exterior "Zinsco" Breaker and service panels ($10,500), remodeled 2 bathrooms, replaced 3 of 5 water heaters, smoke detectors, added kitchen and bathroom GFCIs, 1 AC unit, 1 new dryer, replaced 2 windows, repaired several more windows.

It is a 1900 sqft 4 bedroom/ 3 bathroom interior rowhouse built in the 1900's that has been recently updated. 

So, I set up interior cameras separate from the security system and they're connected to wifi.

I only spray for interior paint.

Since we don't have much experience in construction/rehab right now, we would primarily only focus on a property that needs cosmetic/interior renovations and would generally avoid properties with major foundation/roof/plumbing issues.

Since I purchased the home- I have been renovating both the interior and exterior.

On my end - I've heard that some of the easiest (and potentially cheapest) tricks could be:- applying a fresh coat of paint on the exterior / interior living room spaces of the home- refurnishing doors / door knobs - updating the lighting of bathrooms or kitchen area light fixtures- bathroom refurbishment- curb appeal / clearing out excess weeds/trees/shrubbery.I've also heard of situations where the home owner would either offer to build, or provide a backyard shed for the tenant as additional storage space, charging an extra $100-$150 per month if the tenant wanted to use it. 

Over the last year, I have updated the interior and I now have a great tenant in the other half paying me $800/mo and I believe I can get $850 for my side when I move out. 

Newer rehabbed properties will pull in more value than outdated older interiors.