Anything involving a service animal and ADA should be directly consulting an attorney on the matter as every case is different. 

Open to all suggestions.I would visit Columbus and consult a real estate attorney.

For example, if you are in a 24% tax bracket and the house is valued at $200,000, your potential tax savings might be around $48,000 (24% of $200,000), but that's a rough estimate and assumes you're itemizing.It's always a good idea to consult a tax professional to ensure you're maximizing your deduction and following all the necessary procedures for your donation.

- The market is in a little bit of a lull right now (buyers market), its a great time to buy, but slower time to sell (my primary business is flipping houses) I can supplement my flipping business by providing project management services/consulting, helping investors find discounted properties, etc. etc.

My suggestion to consult your accountant or tax prepared referring to points which also know as loan origination fee and interest rate how this will affect and will this be an advantage for your business?

Then I would seek a legal consultation from a real estate attorney to assist in evicting them if they will not leave (we have a few great attorneys we work with in the area). 

Nevertheless, continue monitoring the cracks, and if things progress, consult a structural engineer.

Quote from @Patrick OHalleran: Hi David - I used HallCPA for a Consulting engagement (about $5k) and found the tax planning support to be very helpful. 

Over the past decade, I’ve built and managed purpose-driven homes in CA that serve communities while generating stable, long-term cash flow.In addition to running care homes, I also consult with aspiring care home owners across multiple states, including Texas, Arizona, and Michigan (Detroit area).

Patrick,  I am an investor consultant with Build 2 Rent.