The door flew open and a woman who was not my tenant, but I know had been living there for almost a year, stormed our SCREAMING at me that I did not have permission to enter, blah, blah, blah. 

If he is using something we're paying for without our permission, he is stealing, plain and simple.He stopped. 

Your proposed situation would not be legal under the tentative plan“The proposed city rules would allow short-term rentals as a permissible accessory use in all city zoning districts that allow residential uses.

I can't speak to the legality of marketing your interest in the land without the owner's permission, but I can speak to the ethics.

They're doing it without the knowledge or permission of the Landlord.

Technically speaking, a cost seg is moving from an “impermissible to permissible method of accounting”, so you could argue everyone must (but the IRS wouldnt fight you on this haha)You should get a free ROI analysis then run it by your tax advisor

The dogs are not allowed to be there, his lease is expired, he is working full time which we have proof of and he married his husband, had a wedding, and moved him in without permission which we also have proof of yet no judge will grant an eviction.

For example with the water lines, it sounds like you gave them permission.

I filled out your capture form for the e-guide to hard-money & gave permission for contact.

If she would have asked me I would have gladly given her names of tenants of mine, after getting their permission to contact.