0 turn recruitment time

[Mahrabals apprentice]

0 turn just means no queue. you can recruit as much units as you can and they will all appear next turn.

There is a queue. You can only build 9 units a turn (atleast thats true for the SPQR mod). You can fill the build queue but not make more than that per turn.

[McFungos]

If you want only peasant you can edit desc_mercenaries.txt

something with

replenish 9.00 - 9.00 max 9 initial 9

I haven't tried myself but i thank it can do it.