¹ Canon cost for eight weeks traveling would be about £12, but you have saved a lot by foraging and had starting provisions from Ungulus. OTOH, eight weeks is conservative, it could be 10, and war prices are higher. The cost also covers wear and tear, of course, not just food.
I'd keep the 4 Ungulus rangers together and bring them to oak circle, Ungulus has the 5 others anyway. And it would be worth it to have a full combat squad too.