Haven't played the latest version, but you used to be able to raise it with both Bow skill and Crossbow skill. I doubt you have max in both, so finding a crossbow would be your best bet if nothing has been changed. I usually try to raise crossbow anyway, as the majority of tribes start with quite poor Crossbow skill, and lower skills are much more likely to generate a new point than higher skills. Rather than hundreds of arrows at your cabin wall, it will probably only take dozens.