@Justin Grant Just a couple of thoughts. 1.

Otherwise if you can afford to evict them all and go vacant for a couple months, wouldn't it make more sense to rehab the entire place at once?  

This is a simplified answer but “fixing a couple little things” will not make a huge difference.

I have found a couple of good ones on Craigslist and by actually finding them working on jobs.

Try a couple small local banks and big banks and find someone you feel comfortable with and who has the best rate (take into consideration closing costs and other fees, not just APR.)

I'm interested in taking a look at a couple properties that would require major rehab and would like to have a contractor for estimates.

"Dude it's like a pound man"  Well a couple of years later I had some plumbing repairs on the bath tub.

Couple that with vacancies, late rent, turnover and repairs to apartment damage between tenants. 

How I do it is through selective screening and I have been 100% successful.By instituting certain screening standards it will naturally eliminate the vast majority of non target applicants.For example young couples with children will generally have lower credit scores. 

@Caleb Teachout, I'll send you a couple I know.