I know what you mean; most do not consider that they will be holding on to a lot of these snakes for a while. The thinking goes along the lines of "oh, I just need to get 3 meals into them and I can post them for sale, and they will sell within a week or so" which is just not the case. Be prepared to watch at least half your babies hit 400-600 grams before you end up selling them. I plan to keep most females until they hit that size because it makes them easier to sell and worth more than a hatchling. Yes time, food, bedding, electrical etc. goes into that as well, but overall it is a better practice IMO.
My advice was a general statement on the topic - not directed at you at all.