Kevin, I built a FWD swinging Bottom Bracket SWB from a couple of BMX bikes that might be of interest to you. It rides like a cloud (cumulo nimbus), and the second prototype is a single speed (not a fixie).The seat is a little uncomfortable since I didn't have anything to cushion it, it's just bare plywood. I liked the first prototype, but it had 20"X 2.125"  tires for cruising rather than skinny race tires.
 
Opus

DB,
 
If you really want something inexpensive, I would loan you my bentech for an extended period of time. 32.6 lbs of homemade wonder. I have put over 1000 miles on it and since the Bacchetta it is very dejected out there in the garage. It is a LWB and the bottom bracket is about seat high. Feet easily on the ground. The distance from the back to the extended pedal is 41".

I don't have either prototype in had right now. but I can throw one together in a couple of hours. I was planning on making another single speed bent after HHH anyway, just to have a little variety in my ride to church. I never shift riding to and from church anyway, so a single speed would work just dandy for me. You want a freewheel or a coaster brake? This would be somewhat of a "hairshirt" bent, but still more comfortable than a DF bike.
 
Opus