Other ideas I've had are perhaps less conventional, such as offering English language classes, providing info for tenants to access free counseling if they have marital/drug/mental health issues, and even hiring tenants to make repairs if they are qualified to do the work and trustworthy individuals.

Did the treatment from Orkin get rid of the fleas, or are there still fleas?

I went to a high school where drugs were cheaper than school lunch and there was no long line to get a hold of them while it took you 20+ minutes to get a slice of pizza.

We deny applicants/residents with felonies or misdemeanors of a violent or drug related nature.

I've seen some where the studs were literally collapsing into a powder from rot.The last one we did was an old 60's era cast iron tub that we had refinished several times (about $280/treatment) but it peeled.

I see this as a huge opportunity even though folks claim these tenants are the lowest, but I'm not going to rent to felons and drug addicts. 

Account Closed, Unfortunately, properties acquired with the intent to rehab and then sell or flip do not qualify for 1031 Exchange treatment. 

(2)  Tenant has a felony from 2007 for drug conspiracy charges.  

Yup, They as property owners can make the terms of the lease as to what ever they choose. month 2 month term, 12 month term,rent amount, utility cost , number of occupants, crime free/ drug free.

Yes you should be able to evict the tenant where incident occurred,, They are responsible for actions of guests.A Crime free / Drug Free addendum spells it out but I'm sure you have Cause.The police will probably issue you a notice saying they want the people in that apartment to be evicted.I've gone thru a murder in my complex guy shot for 400.00 dollars worth of pot his girlfriend was given choice to move in 5 days or we would file eviction she left.We gave her deposit back to her.