., getting tenants to follow rules, fixing broken items, painting, keeping up the lawn, etc). 

I bleached the walls and cleared most the items out but there is still a strong musty odor. 

All big ticket items are done(roof and sided 5yrs,mechanics 7-8yrs).

Make sure to leave enough equity to make money of course, and budget for unexpected rehab items to make sure you don't lose your shirt on any deal.

The only item that comes to mind is that if they are labeled with the address on the 2 spaces each person gets, then people know when they are home and when they are not.This is a small thing that may not matter much but I thought it was a good question. 

You'll only need to contract out the more specialized items.

Now NY and NJ are just way out there so I do stay away, but Maryland is a good example of where I like to invest because of those items noted above. 

The amount of Bluetooth enabled socks/wine bottles/water bottles and completely useless items are sitting in nightstands and the bottom of closets.

If you can provide a few more informational items we might be able to give some more specific advice. 

Electrical, plumbing (the main items), plus cosmetic work painting and some new appliances.