Maze explanation is here.

Startbonus: 400 coins

Collections: 600 coins every 8 hours (7200) = 7600 coins.

The total does not include coins we can get from quests or dragon tv.

For Collecting times check this.

*Dragons:*

Paladin -R- #97: The path costs 860 coins.

Clone 1 -VR- #1528: The path costs 2825 coins + 1 key = 3285 coins.

Stardust -E- #1112: The path costs 3630 coins + 2 keys = 6005 coins.

Robo Hound -L- #1612: The path costs 6020 coins + 3 keys = 10830 coins.

Timelimited:

Dec3-5: Tank -L- #1119: The path costs 8165 coins.

Dec4-5: Ignition -L- #494: The path costs 6720 coins.