. - In Nov 17 tenant's parents (these are college students) call my property manager to report a broken dryer and mold growth in the basement laundry room, a bedroom above the laundry room, and in the bathroom.

I would assume they could but I would double check that detail.

I like Rentometer because it give you an estimate based on comps within 1 mile or half a mile based on number of bedrooms, Hotpads shows you whether the comp is an SFR or apartment,  Zillow will show the price of a comp without having to click on anything, and Craigslist offers results that may not appear on any of the other sites.

No, not even if you are paying all cash like some people would incorrectly say.It's entirely possible to earn a double-digit IRR on a 5-cap property. 

What happens if the rehab costs are double what she thinks?

Since my first double in 1999, I have gotten my NYS Associate Broker's License & acquired a few more doubles as rentals & done a few flips as well. 

My property has about doubled in value in the 10 years, but rent has only slightly increased. 

Hello,I received a letter from the county or city (I'll have to double check) stating that the assessed property value has gone up by 30K. 

There are ALWAYS exceptions.That being said we have converted a one car garage into two more bedrooms on several occasions.So you answer lies in where do you see this property in ten years.

@Meera Lakhavani -100% you should market it as a bedroom.