Bravo!! great post!!!
On top of all of this remember that you must also take into account the baby's that you plan to have two snakes are fairly easy to care for but when 2 becomes 8 because you had 6 eggs hatch.
Feeding the new comers is the biggest hurdle to get past. Because you go from feeding 2 snakes to feeding 8 or even 13-14. Make sure you account for that.
Don't for get any vet visits that may come in to effect.
If you plan to sale the animal you'll need to take in to account shipping supplies which can run 10.00-20.00 per animal.
Like Kelly said this is not to talk you out of it..but rather to keep you from getting blind sided.