Maybe just say you will pursue legal action if the situation isn't immediately addressed.

https://www.biggerpockets.com/forums/51-tax-legal-issues-con...

@Marcus GriffinTypically as part of a modification the bank will have a “shock package” which includes information and forms to be completed by the borrowerOn those forms there are questions like will they or do they occupy the property, there income, do they plan on keeping th home.This is equivalent to lying on a bank application which is most likely considered fraud Not providing legal advice but this is definitely a very slippery slope you are getting involved in.

Is it better to respond legally or simply to fill out the form. 

If you need financial help, ask under the "Finance, Tax, and Legal" forum.

I'm considering buying a property in Southern Maine that is about 5,000 sq ft too small to legally subdivide per the town's zoning rules.

This is legal and will get the job done.

What are we legally required to prorate/deduct in rent considering it is their only shower and will not have one for 3 days?

Harassing your tenant on being late, when they are not actually late will end up with him having legal action against him.

Quote from @Kathleen Park: I recommend you educate yourself on "ordinary wear-and-tear" vs damages, depreciation, and your state laws.Do yourself a favor: buy "Every Landlord's Legal Guide" by NOLO.