If your contract states something like that, you have a case.BUT - you won't really have a case, because any attorney who would take on this would likely want a $10k retainer just to get the ball rolling.

I recently reached out to one of my lenders to get the ball rolling on a new loan.

She basically said that making such offers was a waste of time in our market and she wouldn't endanger her reputation by making such low ball offers.

The Option Contract doesn't conflict with the Refi mortgage.However, when (if) the Option is exercised, a Purchase Contract is initiated, and the mortgage needed for that contract takes out the Refi when paid.

I would exercise that strategy rather than pulling money out of your accounts. 

I had help from a RE agent and went in with a low ball offer.

And yes, trust and believe, once your buyers find out that the house was a former Meth lab, you best believe the low-ball offers will be coming left and right.

And then there's a separate document (which could have been made part of the lease) that is the option to purchase, which is another matter entirely and becomes null and void if they don't exercise it in accordance with the terms to complete the purchase.Now this does depend on the property state laws as well as what your lease says and what the option contract says.In a standard landlord / tenant relationship, if they improve the property they did so at their own expense with no expectation of being reimbursed... but again, what do your documents say to this?

In my experience the buyer, since they are renting to someone(typically) does not exercise the same amount of care for the property as a lease option tenant would. 

@Jonathan Cooksey If the tenants are not used to leases and/or rules and regulations of the park, it will be a training exercise.