Re: too many choices
the kit is easy to move after you get it past that first install. I have had mine on three bikes already so I would say start with the biggest heavies steal frame you have laying around. Remember weight isn't a big deal since you won't be muscling around often.
I usually convert the crank set to a small set, then go with a 20" rear wheel. It is much easier for me to swing my fat butt over. It also gives a nice low gearing for starting at the lights without the need to change gears. That is just my personal preference though.
My posts have entertainment value only. A bike ain't yours till it has your blood on it. Then it owns you.