The comparable sales approach can be tough b/c sometimes I can't find comps, especially in Philly where each property and each block is its own unique and special flower.

There are a variety of products out there for sound proofing ranging from practical to what you would use to build a recording studio ;-)QuietRock and other products like it are a double layer of (typically 1/2") sheetrock with a baffle between them designed to dissipate sound waves.  

Now if you felt that this was going to be your last home and you plan to have your ashes scattered in the flower bed when you die, then having that additional long term income stream from an ADU might be a great investment.

Also, your insurance agent might offer incentives to you too, ask about it.Many fires have started by smokers tossing burning cigarette butts into flower pots, barkdust and other landscaping material.

Daunte Flowers

I do have a vase of flowers (fake) that I take with me from rental to rental.But no furniture or wall art.

Make sure he is within the limits for 2 adults(6 in flower, 6 in veg).

Thieves, especially those of the copper thief variety, are using addresses posted on "houses for rent" on Craigslist to target houses.

You'll get a variety of opinions on that one.Lots of folks say wholesaling.

I work as a commercial lender at a small commercial bank and have seen these deals done a variety of ways.