Fundraising... T-shirts?

So we've read lots of ideas on fundraising, and one of them that we really liked was a tshirt fundraiser. I have created a design that we both really liked and were just curious what everyone else's thoughts were and if it'd be worth doing this as one of our first fundraisers. We'd be selling them for $20 each (for S-XL) or $24 for (XXL & XXXL). We're also looking into the prices for kids sizes, because I know Ilana already wants one!

This design is obviously the continent of Africa, and the blue heart (matching the one on our blog) is right over Ethiopia. The letters of HOPE is made up of tiny little words saying "tasfa". Tasfa means hope in Amharic (Ethiopia's language).

Then, written on the back is "I helped defend the fatherless..."

So anyway - what do ya'll think? Questions, comments, tips, advice? Please be honest! :)