Tandem cargo bike
I think that is a great idea especially with what gas prices are doing lately so, I have been working on the same type of project and with a fold down platform so I can haul a bicycle frame or complete bicycle in a bicycle Box to fedex.... Just be patient and wait, a tandem will come around at an affordable price, I bought a trek Fast track tandem the other day for 300 bucks and last Saturday a cheaper tandem for 40 bucks at a garage sale ! Check out on youtube a vid called "Ultimate tandem cargo bike" the guy built an awesome attachment for tandems...it's amazing but his website is gone and he is nowhere to be found...like the comments in the video suggest ...maybe Xtracycle paid him 5 million to walk away