Have you considered some of the KIT cars?
they are pretty customer already - and many have a base offering of the frame / body from which you can then customize.
I like the Lotus 7 kits (
:: Index)
some guys have modified to be electric
Some of these guys have built the frame from scratch - there are many existing plans available so you do not have to engineer the basic frame - ( NOTE you WILL have to get into the details for the suspension geometry though)
This takes MOST of the guesswork out. ( although Lotus 7 is NOT very aerodymanic - but for intown electric driving - it would be really ciil
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Steve - AKA Doofus McFancypants
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"If there's a new way, I'll be the first in line - But it better work this time"
First Milestone passed - 30 MPG (city) 5/15/08
Best City Tank - 8/31/09- 34.3 MPG (EPA= 20)
Best Highway Tank - 5/20/09 - 36.5 MPG (EPA= 28)
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In effort to drive less:
Miles NOT driven in 2009 = 648 (Work from home and Alt Transporatation)