In talking with a close friend of mine about my personal real estate investments in 2018 he informed me that he and his wife are seriously considering investing in real estate as opposed to funding a 529 plan for their children's college educations. 

The grounds that may help is if you can argue that it is negatively affecting the health of your other residents and making for an unsafe living environment (especially if any children or infants are around).

I want her to never *have to* get a job to support herself and our children. 

So in reality about 12.5 percent of households can afford a crap shack and keep in mind many of these households already own (and many are welcoming back those lower wage children back home).

I do like Cats and I like Dogs and I like children

Is there a seller-financing option that reduces the tax bill if her children inherit the note?

Three heirs, likely children, inherited the property together.

I know you cant reject someone for having a child but children can cause alot of damage.Would you rather have a small child in the house and worrying about them drawing all over the walls and ruining the floors and other things or would you take a pet?

What I think you're missing is what I explained, that families that want to live in the city figure out how to get their children an excellent education, despite the city's overall school district being poor.They don't just send them to the local neighborhood school if that school isn't good enough.

However, could you confirm whether he has children with her?