We verbally pre-screen them to make sure they don't have evictions or sex offenses or too low of income.

I am trying to decide if it's a good investment to purchase an AU or two before I apply for funding.

@Joe Au-Hi Joe!  

It's a small park (17 units) and it's cash flow positive out of the gate and has seller financing (a huge plus for me).But after doing some research on the park, I found some concerns:- 3 months ago, a couple was arrested for making meth in one of the homes- There's a level 3 sex offender living in one of the homesThe park definitely needs cleaning up, but those two things so far are the scariest to me.  

A sex offender can be right next to you in an RV park and you would not know it.  

Some felonies - sex offenders for example - are never going to be acceptable to me.Ask around with others as to what their approach is, but at some point you will have to figure out what suits you.  

Even though they are existing tenants, you want to screen them and ensure you don't have a violent felon, drug dealer, sex offender, or other danger to your property or other tenants.3.

Look for single family homes with mother-in-law/Au-pair suites or attached apartment.

A lot of states nowadays have Meghan's Law where the whole community will be notified of a presence of a sex offender and also restrictions on where such a person may live (not within so and so distance of a school, church etc). 

I put our condo for rent in Chicago and three very similar tenants, (same age, race, sex etc) all saw and submitted the application at the same time.