BarelyAWake, thanks for all the info. I think I could probably work out the cutting myself although I would definitely need someone to do the welding.
I am on about page 7 of your T3 thread, and it looks like at this point in the build you are using the frame from an old ATV (I think), is that what you ended up sticking with? I guess I am asking if you ended up building the entire frame from scratch or if you pieced together different section to create the final frame.
Also, when building a tadpole like this, what do you use for the "front end"? It looks very complicated; did you build that section yourself or is that a pre-built piece you found somewhere? How about the back end that the wheel attaches to? It actually looks like it's from a standard bicycle. Thanks again, I'll be reading through your thread some more!
rogergendron1, that may be my best option. It seems as though there would need to be a lot less tweaking with a standard tricycle. I am surprised at how expensive they are to be honest though. I will be looking into standard trikes a bit more.