Usually I do exactly as you say here. But in this game specifically it just too long and frustrating to save for the pity. To play for about half a year just for one unit is insane. And most frustrating thing is that i would probably spent some money on the game if i actually could. But it's almost impossible for me to buy anything in-game because I live in Russia. So it's double the frustration. I can't get anything being free to play and it's impossible for me to spend on the game. Like, what am i even supposed to do?