I've been obsessively researching printing on my time off for the last 3 weeks and still feel like i know nothing, but if i don't get my hands on one soon Im gonna go crazy! Blue thingie i think it's called

i waited for the last two weeks to go to a meetup.com event, hoping someone could give me advice on buying a hobby printer, but everyone was either virgins, or hard core silicon valley industrialists who sneered at anything in the 4-digit price range. so, based on print volume, the enthusiasm in this forum, and the coolness of deltas, I'm taking the dive with the max.
I have seen a lot of good info in forums, but no good organized data. i was wondering if anyone could point me to:
how often can i expect printer parts to break? what are preventable/expensive problems?
list of orion specific upgrades - what can i hope to do with it?
a good place to read up on CAD/slicers
nursing applications for printing. the stem cell organ printing stuff gets all the glory, but us nurses must have some use for 3d.
making $. I don't want to be the next Ford, but if i can sell stuff on craigs list to pay for this printer, then my wife may let me buy a nicer one. maybe carbon fiber next time. i have ideas for some products, but how have you marketed stuff?