Some questions.

[Saint_Dude]

1) yes

2) no

3) Units use size-1 supplies per turn. You can see a unit's size by clicking on h.p.. Horsemen are typically size 3 and thus use twice as many resources as typical size 2 foot soldiers.

4) no. But this may require a lot of wine. Supplies can approach 0 in a long siege.

5) yes