If someone is so "disabled" they can't live in the privacy of their own home without the presence of a dog or cat, that indicates they are in need of regular, on-going treatment.

Pest control cost me $250 for a 3 months treatment Thanks everyone for your pointers and help , it does good to even vent this out 

That would insure he could take his treatment no matter the weather, time of day, etc. 

You need to establish yourself as someone who won't be putting up with this type of treatment, and to establish that paying her rent on time is a priority, if she doesn't want to get evicted.When I took over the building I managed, I couldn't believe the excuses tenants were giving the previous manager/owner (brother of the owner I worked for). 

I think I offered reasonable accommodation by offering an $800 lease like all the new tenants are getting....What you described might be fair treatment, but I would say that it would fall short of what a hoarder's request for "reasonable accommodation" might be.

We have to be careful and make sure that we give all tenants the same treatment.

Do you mean for substance abuse treatment?

You should ask the water company to deduct out of the bill the sewer charge because they never made it to the drains for treatment, that should be on top of whatever consideration they gave you for the water leak.You may also be able to work something out with the water company so the outstanding balance can be paid over a period of time.It may be necessary for your tenant to call since the name on the account is not you. 

If the tenant has a legitimate issue I would try to work with them as much as I reasonably could, but they would need to provide me with documentation from their treatment provider that they are receiving mental health services - they do not need to tell you all the details just validate the issue.

It was a miserable experience for me, as a result of his disorder he really believed that he was entitled to all types of special treatment.