@Shahar Joseph  a support dog (probably an emotional support dog) you cannot legally refuse however you can have a policy for documentation of a need by a qualified professional and you cannot charge for and ESA.  

It does not have to be financial, it coujld be also emotional and they might feel relieved selling it to you.

#1  Tenants/Contractors/Neighbors, etc will stir emotions in you that you didn't know you had. 

My advice for the process would be to present facts, not emotions.

Don't get emotionally attached.

In the future I will use the math to remove the emotion from my decision making.

Mostly I learned not to get too emotionally attached to a property.

All of us that have been around awhile get fatigued seeing the same questions, of course, and your suggestions should help👍Now excuse me as I get back to that emotional support animal question I've never heard before...

It’s no good to go in with emotions high! 

Good luck and stay active here, it will be very beneficial.One last note, when starting out, it can be an emotional roller coaster, one day you want to give up and the next you feel like you are on top of the world.