Big box will lull you in with essentials and get you with accessories.

Two 14x70' lots will make for two nice single-family row homes.For the CMX2.5, ammenities to an apartment building are considered accessory spaces and still classified the same as the apartment itself (residential).

You can buy good pieces that might need a coat of paint or accessories to decorate the home with for not a lot of money.

I see on page 4-15 of the zoning document you forwared that for the zoning E-TU-C mentioned, that a duplex is alright, as is an accessory dwelling unit.

Paul and I have been creating accessory apartments and been involved in construction for over a decade.

In fact, there are green home building websites now that offer aesthetically designed environment-friendly prefab houses modern outdoor and indoor furniture, home accessories, etc.

It's considered an ACCESSORY, almost like a finished workshop, shed, etc.

Here are my options:1) Build a detached accessory dwelling unit (ADU) in my backyard. 

Even if it is not zoned for multi-family, some cities allow granny flats/guest houses/accessory dwellings in a single family zone.  

I've got a walkout basement with crawlspace that I'm planing for an accessory dwelling unit, but it needs some digging.