re lpg, my tupence worth, its important to know what your going to do before you do it, or you'll end up with a knightmare on your hands. To me, info is best dealt with on a hand me down tried and tested basis, better to visit a member who has been there before, see whats to be done, where it all goes plan it out in your mind ready to do the job. From there you can start with improvements in mind rather than repeat any niggles that may exist and impose that on all cars in a group session. Takes time, its defo not something to rush into, although the sooner you do it the quicker your start saving money.
If i where you i would research it, do a car, with others helping, then move on to the next car with improved knowledge and so on.
Having done mine, and with a fading memory of it dont forget, i suspect its possible to fit the front end kit in a day, rear end kit in a day, conect it up finnish off and calibrate on the third day, roughly. But thats with uninterupted work, no pondering on where and how does this bit go etc. Mine actually took me 3 weekends, and i had Kevins car as a template, and he connected the electrics for me.