Daily cost could be adjusted depending on the type of unit. Horses need more food and cavalry units have more gear in general so upkeep should be higher than footmen. Units that use ammo of any kind could also cost a bit more as the projectiles are used.
i might be wrong but probably your top units gets choosen for bandit lair. But even if it was like that i would appreciate more user friendly troop choosing screen.
I thought it was like that but it seems like it still randomizes some of the troops. I always order my troops in the party screen so i have the best units at the top. Still managed to get a couple of low level troops sometimes
Im trying to do a foot soldier only army and it seems like having a horse equipped to your lord increases the movement speed on the world map. There should be a way to decide that you want to start on foot when u engage in battle. I feel it should be quite obvious that your lord is riding around...