ahahah it's okay, I like to help, I saw your question without answer and with some quick research about the costs of each dragon I had all the info, 'cause the rest I already knew
I don't know if you know that and if you are gonna understand what I will say, but it's a important info too, when you have a gold dragon in the habitat, I advice you to have an exactly hour to collect the gold, collect 24h and a couple minutes later every day or not, that deppends what level is your gold dragon, if you have 1 or 2 dragons in the same habitat and how active are you in the game, for example, when the dragon is between lvl 1 to 3 you can wait 5 days to collect 5 gold instead of collecting every day only 1 gold xD if it's between lvl 4 to 6 you can wait 2 and a half days to collect 5 gold, if it's between lvl 7 to 9 you can wait 1 day and 6 hours to collect 5 gold, and when the dragon is on lvl 10 you only need to wait a whole day, hope I could help again xD
This happens too with all the habitats, but the gold one is more important, in my opinion ahah