He went out there and told her that he would take care of it and the price would be reasonable.

Seller doesn't care they just want the house sold. 

Out of the 20 letters I've sent, I've had 1 guy get back to me and we were in discussions but weren't able to find a price that worked for the both of us.The issue is that I only have a few houses on my mailing list so far (just places I've walked or driven by that caught my attention), and blindly searching every street and address # to see which houses are actually legal multifamily will take forever and doesn't seem efficient.I know the data is publicly available, I just don't know how to aggregate it in a way that would be efficient and useful for blasting out marketing mailers.Are there any websites that can pull massive lists of all multifamily houses in my area?

Tell them to come up with a solution to keep the dog quiet (eg doggie day care) or find a new place to live.I wouldn't care how long the barking is going on...if it is anything more than a one off, time to deal with it.

And of course, most homes have HOA's (homeowners associations) that can be $20-$250/month to pay for community maintenance, sometimes lawn care, cable/internet, amenity upkeep, pool, security etc. 

Interesting topic.We had a long term tenant who went from taking good care of the unit to letting it become a pigsty inside and out. 

I am looking for a house inspector who goes into every tiny details that need attention and uses a good reporting tool to look at the issues.

No one cares.

Seeing their place is a great way to tell how your tenant will take care of your property.

But who cares, YES marketing for them .