Regarding all the calls you are getting: wholesalers know this is the worst time of year for vacancies.

Do that before you spend any energy trying to kick him out.If he hasn't paid rent, you can call the police and have him escorted from the property. 

That being said, and this is not for a sourcing homes for sale, but to source accredited investors in my line of work, the average marketing agency is looking at about $30-50/accredited investor lead setting up a call. 

Although you might be able to get away with it for a while, all it would take is for a neighbor to call in and you could get shut down or fined.

In fact, I just had a call with them yesterday, from my Ivory tower here in Maui.

Yes, you can seller-finance the property with a wraparound mortgage (also called an all-inclusive trust deed).

If your business entity is taxed as a C corp, the entity is taxed at that level (double taxation as you call it).

I've called a couple title companies there and they are not familiar with the process and one said that the practice CANNOT be done in the state of IL.

Or was it just you driving around a side of the city you work in until you found those distressed properties to call on?

Didn't he just say he just had "10 Due on Sale called"?