If pets are allowed, you also have to think of what happens if the next tenant has allergies. 

what if a visitor has a young child that has an allergy to that and eats it?

She even goes as far as none of those room freshener plug ins or spraying of air fresheners, presumably for allergy reasons in her multi-unit.

If you have allergies, my apologies - bring your medication.

In recent years carpeting has had much research on allergies and other objections.

In both my pet units and non pet units that have an ESA, I charge tenants to place unit in animal free state at move out (duct cleaning and filter replacements, pet allergies are common).if a tenant has a legit ESA, I would prefer them to rent one of my pet friendly units (which have private yard) but I do not get to make the rules.  

This makes it an excellent option for people with allergies or respiratory issues.Waterproof: Most tile flooring is waterproof, making it ideal for areas that are prone to water damage, such as bathrooms.

I need to make extra money to help her and my 2 kids that have inherited high allergies to gluten,dairy,egg.

Our lease specifies that the tenant will be charged for professional HVAC cleaning at move out (some people have pet allergies).  

Dander, odor, allergies, barking, hair, etc.