That's my question.... how to recruit them and where?
There is a man in Qohor tavern. You need to buy him a drink, then he'll try to sell you Unsullied for a hefty sum.
"A hefty sum"
Worth. Every. Penny.
Keep them in a shield wall and they'll wreck much better armored foes. Their short Falchions are perfect for shield wall work.
And no upkeep. One time fee of 1500 a soldier. It would take many days and at least that much to upgrade a Northern Spearman or a Dornish Heavy Spear and these guys are better. Maybe not as well armored but very versatile and fast.
My only question is how long to wait to buy more? 1 week? 1 month?
Closer to one week than a month. You should test it but I believe 1 weeks is enough, and if not it is 2 at max.
One in game week
It's not about unsullied but does a players rep effect recruitment from villages? Because I tried 23 villages belonging to Dorne and only 3 allowed me to recruit from them and I have 25 relation with most of them.
It's making warring a nightmare because losing as few as 20 men takes weeks to replace.