Made some calculations:

To level 1 kingdom you need 122 500 gold.

We have 19 kingdoms, so 19 x 122 500 = 2 327 500 gold.

If i want to buy gold with cash, i have to buy 2 327 600 / 30 000 = 77,5 Dragons’s Horde (30K gold each).

Let’s round it up, so for 78 Dragon’s Horde i have to have 78 x 240 = 18 720 gems.

To buy 18 720 gems i need to purchuase 12,5 Motherlode of gems, each with 1500 gems.

Let’s round it down (everybody has some levels on their kongdoms) i have to spend 12 x 99,99$ to get so many gems.

It’'s freaking insane! 1200$ to level up all the kingdoms!!!

Another calculation:

Let’s say, that with Dragon Armor i can make 1000 gold for an invade.

2 327 500 gold needed to level up kongdoms divided into 1000 gives 2327 invades.

Let’s say i can do 15 invades a day - that gives 155 days of very active play to gather enough gold to level up kingdoms!

Still little insane. What do you think guys?