The board of county commissioners shall have the authority to cancel any contract if the purchaser fails to comply with any of the terms of the contract and the county shall retain all payments made on the contract.

And I would have them sign a written statement agreeing that 1) they will comply with all codes, and 2) if there are any fines they will pay the fines plus a fee to you for the trouble. 

As always, check with your attorney first to make sure you're complying with local laws.

So foolishly I complied and now I am afraid that he has any personal information he needs on me.Unfortunately, I had finally done my due diligence on Mr.

Give him the standard 5-day quit or "comply". 

If your CPA does endorse an S-corp, make sure to ask him about changing your business practices to comply with S-corp rules.When doing distributions, remember to leave enough money in the company account for future expenses, including paying the CPA.If you're planning to dissolve the company, I recommend prepaying the CPA before dissolving.

Referrals and kissing a lot of frogs.Another option for you is to look at passive commercial opportunities that comply with 1031 exchanges. 

Is this considered theft, and/or should I serve the tenant with a three (3) day notice to comply or quit (correcting the violation)?

As long as the maintenance was taken care of within a reasonable time frame and complied with landlord laws then you should never lower the rent or take partial payments.

Much of the frustration with "banks" come from their having to comply with "Dodd Frank" legislation that doesn't recognize depreciation as simple accounting and only looks at the taxable income, not the free cash flow, on a property.