Or if the 2nd floor tenants are actually unreasonably noisy, send them a warning letter and then if no change, ask them to leave.That said, if you want to placate the first floor tenants you could have an "energy audit" by RISE Engineering where they look at the house especially in terms of heat loss and come up with a proposal to add insulation and other energy-saving features (and give you free LED light bulbs :).I'm not saying that insulation is the same as sound proofing at all.

@Matt Buckelstry and find the other owners in the area and see if anyone ones more then one and send them a letter 

Bank A says after that it'll be 5-1 arms at 30 years Bank B says 5 year balloon loans.

Send them a letter telling them you found their house to be apparently vacant.

Getting ready to send out my first batch of checks in place of letters. 

I hand wrote a few letters to the address on the tax info from the county and never heard anything.

Send them a letter telling them you found their house to be apparently vacant.

Well they start with Pre approval letter based on your liquid reserves and misc.With that you can get an offer accepted and a Purchase Agreement.  

The forums at Credit Karma helped me immensely, and I found good form letters to use when approaching credit agencies to remove derogatory marks when paying old medical debt in full. 

If he doesn't need all the money right now and just to unload the property than humor him with a seller financing in the form of a balloon loan where you pay only interest on a monthly basis.