I was first told that I needed to get a contractor, because the city saw our 6 duplexes as a single lot and thus saw them as multi-family, but then I've just applied for myself for each duplex and everything was fine. 

And none of them think differently so they continue to say this in these threads.10k is fine, today.

I've also heard from someone that if there isn't a stove in the 3rd unit then the city is fine with it.  

If 80% of $4,200 ended up on the depreciation line (in addition to the regular depreciation of the building) - you are fine. 

It becomes more preferred if there are children living in the home so consider who you’ll be renting to, but even then I think one bathtub in the home is fine. 

An agent can not longer open a door to a buyer without risking oppressive fines, being sued, or face a contempt of court charge. 

It is fine to take a gentle approach when talking to them, but those provisions are in your lease for a reason.

He was also fine with the rent and flat fee for utilities, since it's around what he's currently paying. 

23 is just fine to get started.

This is perfectly fine.