How many cost one mining transaction in the solo mining mode?
5-10 Gwei
5-10 Gwei for each coin? So it will be 25 * 10 = 250 Gwei for each calling of the mint function?

5-10 Gwei for 1 transaction (25 coins)
Oh... Well ! Sorry for my mistake !
Can i start mine so ? What gas parameter i need set to minimum eth network fee? And what hardware i need?
I has two RTX 2080, can i mine with both of it on one computer?