If you are in a rent to own and executed your contract in the past 4 years, your seller most likely is in violation of Dodd Frank, see an attorney, you might get a new house and/or all your money back!

And any lease violation?

You likely violated all types of tenants rights laws by trying to force her to change lease terms and interrupting her "quiet enjoyment".

Also, check that there are no building code violations if the home is in poor shape.

If they don't then you can go about it two ways, 1) offer to help fix it up and offer it at cost, or fix anything that is on the property boarder such as fence, landscaping etc. 2) contact city and ask them to drive by and see if they can enforce any ordinances that are being violated.

I have a book about landlord/tenant laws in California and it says "You have the right to decide not to participate in the Section 8 program without violating any antidiscrimination laws."

You state your name, your relationship to the property, and your reason for filing suit (violation of lease/non-payment of rent). 

(from what i've seen it can be anywhere from about $10k to $20k per unit)And on a side note, rent control is shocking and do not understand how it does not violate the taking clause of the 5th amendment of the constitution.

Mack  -- go to the  School of the Streets Smarts- trial and error.Visit the court house auctions - watch what goes on - meet REAL INVESTORS there, collect cards - get to know them.Go to your local Housing Court as often as you can - this is where landlords have to go to have a trial in order to sue for their rent - these are REAL INVESTORS and motivatedGo to Housing Court in your area - this is where landlords and owners of properties go to tell the judge why they have not abated a housing code violation. 

The issue is every mortgage company I've spoken with says this would be fraud or in violation of the mortgage terms and could result in pulling the loan and putting the house into foreclosure.