HELOC is harder to get for investment property but not impossible, similar LTV restraints but would work for lower dollar amounts, basically think of it as credit card backed by your house.You'll probably find that closing costs on a cashout might make small amounts seem unattractive... plus if the loans older you're going to have higher rates.

Outside of this, it may help to start with a few basic online sources (rentometer.com, CraigsList, etc) to give you a jumping off point and some rough market insight.  

Before you go out and just spend a massive amount of money for CPA and/or Attorney.

So basically it doesnt cost them anything and you dispose of their problem?

@Jason BakerI am not sure on the condo conversions, but I would be interested to hear some feedback from people who have done it.In my experience the city inspection is very mild and a basic necessities sort of thing. 

If the issue is not overcharging, then flyers with basic info might help  i did a google search and found this https://www.google.com/search?

It basically stalled expanding my rental portfolio for about two years.  

Don't overthink it, it's much more important to have the basic required knowledge and act. 

Basically for some of them it can be a power game to sell if they get their price.

Total monthly payment including taxes/insurance = $675Current rent = $1150 (I think we could get it $1200, maybe even $1250, on the next lease)Our current tenants have been fantastic, handling basically everything on their own and paying on time.