Come back in a couple hours when it’s 99% dry with any type of cheap broom you’ve got, broom it very gently (about half as much as you think you should).

Thus, I feel like my heavy cough symptoms, and inability to run/exercise for long period may be due to mold issues stemming from this roof.  

This way when you are up for renewal and they're complaining again you've incrementally increased rents and they're still somewhat under market allowing you to exercise your strong landlord guns of the "take it or leave it" position. 2 years isn't very long.

I would exercise caution in giving him money since he may feel more liberty in treating you poorly versus some other third party.

I agree with Greg 100% on this one - and he's really being pretty gentle with you. 

Or, get one of those zip ties that has the screw loop in the head, put the zip tie around the drain hose (gently), and run a screw through the loop into the cabinet. 

@Franky JuwanaBefore looking at creative solutions for taking control of the problem, you need to establish first it makes sense financially.Is the price the seller is willing to accept a good price.Here it is an exercise of looking at the income they property will bring in and deduct all the expenses you will incur or are likely to incur.If you establish you have some positive cashflows then it makes sense.Now to be creative, you need to know what your constraints are?

It states that the full balance COULD be deemed due by your lender when ownership interest is transferred to another party(the LLC).I personally have never heard of this clause being exercised by a bank in a situation like this, but it is something that you should be aware of.

I did offer three equal payments which would put them paid off before the end of their lease however they didn’t make the first payment so it doesn’t appear they are exercising that option.  

-I understand that the 15K deposit to exercise the option to buy will be forfeited if I don't exercise the option.The point of a lease option is to collect money up front as a DP or charge a higher rent, part of which goes toward the down payment if they don't have the dp right now.