I'm a rock's throw away from Dover AFB and am currently undergoing a multifamily rehab.

If you delead, and maintain the standard, you will be in the clear.Here's the law (emphasis added by me):460.100: Duty of Owner(s) of Residential Premises (B) Whenever any residential premises containing dangerous levels of lead in paint, plaster or other accessible structural material undergoes a change of ownership and as a result a child younger than six years old will become or will continue to be a resident therein, the new owner shall have 90 days after becoming the owner to obtain a Letter of Full Compliance or a Letter of Interim Control, except that if a child younger than six years old who is lead poisoned resides therein, the owner shall not be eligible for interim control, unless the Director grants a waiver pursuant to 105 CMR 460.100(A)(3).

I talked to a manager and was told the salesman would undergo 'retraining'.

Alternatively, if you can drive to an area that cash flows well, that's undergoing gentrification or has some catalyst for growth yeah you should invest out of state.  

. $15,000 will be able to cover most any major repair that you could undergo, and then as long as you work to replenish it, you should be alright!

The properties right across the street range from 650-700k, There is an undergoing development right next to it on about 5 acres of land.

Nothing of note there.I toured both homes, and several undergoing renovations in both LR and Memphis, before closing and would say I am 100% confident in the work they complete and have no questions moving forward with them in the future.

Here is the situation:I have cash tied up in 4 properties, 2 of which are stabilized with paying tenants and 2 are undergoing rehab (will be complete within a month).

What sort of safety measures would you undergo to make sure I can execute if things go south?

Condo currently undergoing light cosmetic upgrades with plans to put it in the rental market in the next 60 days.