A letter from a licensed medical professional in the State where subject property sits that states that the specific emotional support animal is a part of tenant's treatment for a qualifying mental condition is the federal law.

@Timothy Burnes Don't do it. 10-20k in equity is not worth all those issues.Bed bugs are a significant defect that can take either $5000 and tenting the whole building for heat treatment, which requires vacating the tenants or getting them hotel rooms for a few nights, or a sustained program of prevention with bed risers, leg traps, sealed mattress bags, and the tenants need to keep it up for.. get ready for it.. 6 months, which is how long they can live without a meal.Sewage in the basement could be a big issue if you have a sewer backup problem.The sinking toilet sounds like it needs immediate attention, but at least that's a straightforward repair.The other issues are what I would consider "normal" as in, you could fix them but don't need to in order to make the place liveable.Based on the bed bugs alone I would avoid... if you are comfortable with this level of rehab you should be getting a way better deal. 

In my area they are about $100/month but take care of all the treatments and cleaning.

Heat treatment is more expensive and less effective than other treatments. 

How will we know if the treatment worked?  

Buyers are waiving home inspections, termite inspections, surveys, and giving up reasonable asks like cleaning and pet treatment to be competitive.

There is no tax benefit to the LLC because for the purposes of taxes it is a pass through entity, which means tax treatment is the same as if you operated as a sole proprietor (just owned it directly).

In my area, that includes the following:Race, Color, Religion, Sex, Familial Status, National Origin, Disability, Military Status, Sexual Orientation, Age, Creed, Marital Status, Gender Identity, Source of Income, Immigration and Citizenship StatusBeing 19 y/o, the tenant is feels that this is unfair treatment based on age.

Just be careful on tax treatment and be aware that you will end up with two properties that essentially 100% financed.

You can install a water treatment system that will take care of it also.