for a student I would go with # 2, because its all alive already.
hatching eggs are not 100%, you get stuck with roosters, and sometimes temp can skyrocket or drop unexpectedly (well if its a real nice digital job maybe not so much) but its sad if you lost a whole hatch.
You are lucky lol, My mom would just stick us with chores big time, I had to get up at 6AM and work too in the home buisness, Ive hated grout since I was 5.
My son is 8 and has to clean up his messes (no reward its his mess his responsibility) but he does get $1 for every 100% spelling test, and .50 for every bucket full of weeds he pulls, weed pulling is optional but if he wants money for the icecream truck hes quite fast at it. I can see rewarding for good grades, hes gotten 100% on his weekly test for several months in a row now.