Might not generate much interest here, but one of the most impressive bikes at Interbike was a Tern mid-drive cargo bike that rode beautifully and could be stored or taken on an elevator in an upright configuration taking up very little space. I didn't see this, but someone said a very diminutive lady hoisted the bike up so it must be balanced well (or she was "Mighty Joe Young" in disguise. Think I heard that it is supplied with either Bosch or Bafang motors for $3500 and $2500, respectively.