Hey there!
Did someone say rudis and/or ellioti? I work exclusively with the bitaeniatus and related species. I think they are the coolest, bestest chameleons around.
What are the chances that I could raise these with my limited experience?
Both I find are pretty easy to deal with in captivity. I kept mine in the same conditions and both thrived and bred for me. Both are what I consider a "communal" chameleon and by that I mean a male and a harem of females can live together in an appropriate sized cage. I will qualify this though and say: if you (or any of you reading this) does not already have extensive chameleon experience, then please house the rudis and ellioti individually. Both species breed several times a year and don't need seasonal cycling for it... unlike say the goetzei and true bitaeniatus that are part of that family. Live bearing babies are a little more touchy care wise than the ubiquitous pardalis and calyptratus. The rudis and ellioti babies can be kept together at birth, but I find that separate caging immediately reduces early infant death. Both species readily accept any appropriate sized feeders and they start eating immediately after birth. Like within minutes it seems

Clutch size ranges from 2 to 20ish individuals and can be sexed at birth if you know what you are looking for, otherwise they are easily sexed after aboot 3 months. Sexual maturity is aboot 6 months.
What is the longevity of these varieties?
A couple of years. Not a long time like the bigger species that you are used to working with.
Cool and humid. Cool and humid. Cool and humid. Did I mention both like it cool and humid? Nothing over 80F ever and don't let it drop less than 70% humidity EVER. If you can't provide those conditions then you will not be successful with either.
I also noticed your thread on First Choice Reptiles... any of the rudis, ellioti and hoehnelii from Nick will be WC from him so prepared for that headache. I'm sure you've read the horror stories aboot working with wild caughts. Ask yourself if you are ready for that.
I've answered your questions as best I can, but if you have more specific ones aboot any of the species, please ask.
Cheers!
t