LPN- 1 year
ADN- Approx 3 years (depends on pre req classes how the school sets them up)
BSN - 4 years
MSN - 5 or 6 depending on how you do it.

pay

LPN about 15 bucks (about 30k a year)
RN about 25 about 47-50k a year
BSN about 25.25 (if your lucky youll get the extra quarter) same
and MSN about 30 ish most will be managers or teachers unless you get your CRNA, NP or something like that then about 170k a year

if you become a ADN or BSN you cna travel. can travel with a MSN but most wont cough up the money for it. a traveler makes anywere from 90k-140k depending on part of country or if they own their own compnay and various other things.