I was thinking of trying a longer term like 26 weeks, but at that point to get the ROI high enough it felt like I should just buy some SP instead. Think that 12 weeks is a good time frame to have time to capitalize on the investment you make.
It's really nice that you are helping boost your son and get him going. Hopefully he realizes the opportunity he has here.
Thanks for getting him to add me when you get a chance. Every vote helps!