If my team really needed a QB, I'd give Manziel a chance if he seemed genuinely sincere about behaving responsibly, but I would tell him in no uncertain terms that if he screwed up he would be released. I would stay away from Kaepernick because signing him would infuriate a huge percentage of the fan base.
I'm from Texas and pulling for Manziel to make something of himself. I'd love to see him throw a TD pass in the NFL and flash the money sign again.