She can walk to the Caltrain station.  

Our property is located right in the heart of Capitol Hill, very close to the new Capitol Hill Light Rail station.  

Normally, these things (at least utilities hikes) get a mention on the local news station. 

Near bus stops, light rails stations, and freeway on ramps.

@Dean Klein,please go to the nearest police station and if they like to talk, check what security firm has best relation with them and the activity in the area surrounding your target block.i think ADT will lock you into a 3 years contract, but they are a few other alternatives, wireless based, which you can move/install yourself. sorry my mind is gone today so no link/name.go to the local church on Sunday or check with the most involved neighbor on the block.maybe they are initiatives on the way like installing a city/semi-private camera  or neighborhood watch committee.maybe check with local police/firestation, maybe a recent rookie/hire needs a place.but on the lines of what @Al Williamson, said you are not a slumlord,you are offering nice affordable housing in a working neighborhood. so show that you belong there, be respectful, and walk with no fear and with a purpose.

He is making $40K a year managing a gas station.

The local police station will offer a "landlord" course which basically runs over your responsibilities to your tenants as well as the community.

I'm stationed overseas and this tenant from hell stop paying her rent over 7 months ago.

I remember before an investor was burned using pay rents online.They had it where a tenant could pay and also could deposit money or wire money in.What happened is the tenant sent in 300 instead of the 600 owed into the landlord's account.The tenant argued in court that the landlord accepted partial payment and was going to work with them on an arrangement.The judge sided with the tenant.So the moral of the story if you are going to do this is only a set amount is allowed to be paid with no partials.If they try a partial it should reject the payment.Of course you can work out a payment with them IF YOU want to but you want to control that and not the tenant.On paying cash when I was 17 I was running low on cash.I went to the gas station at night and put about 11 in gas in the car.I had the money in coins quarters,dimes,nickels and pennies.It wasn't rolled.The gas station employee refused the money and I told him he had to take it.

Currently, he's stationed in Colorado Springs, CO.