How many coins need to run a master node? In github instructions is written 5000, on masternodes.online website 7500...
This coin has auto adjusted collateral with specific block range.
For the blocks from 90.0001 to 100.000, the collateral is 7500, as you saw.
Next, from the block range from 110,001 to 120,000, collateral will increase to 10.000 coins.
All you need are available in the OP, at specifications part.