Maze explanation is here.

Startbonus: 400 coins

Collections: 600 coins every 8 hours (5400) = 5800 coins.

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

For Collecting times check this.

*Dragons:*

Ifrit -R- #440: The path costs 860 coins.

Calaca -VR- #976: The path costs 2825 coins + 1 key = 3285 coins.

Elephant -E- #701: The path costs 3630 coins + 2 keys = 6005 coins.

Elder Blaze -L- #1514: The path costs 6020 coins + 3 keys = 10830 coins.

Timelimited:

27 -29: Forest King -L- #1391: The path costs 8165 coins.

28 -29: Cyclone Genie -L- #1416: The path costs 6720 coins.