Just price of a horse ?

[Chacal]

From your experience, what sould be the added cost for a horse (let's take it easy, normal horse for light/medium cavalry ?) I think it's about 15 gold in term of gold price ( price of 1 infantry = 10, price of a cavalry = 25, price of the horse =25-10=15) , but what about resource cost ? If i calculated well with the DB, the resource cost of cavalry is only, like for infantry, the cost of the equipment of the man on the horse. So horses have no resource cost basically ? Is it right ? I'm asking as for adjusting the cost for all my cavalry. Is it still true or heavy, armored cavalry ?

Thanx for your answers, and in hope i was enough clear despite lack of english.