I have a 9 inch craftsman that was my first band saw.  With the 3/8" wide blade,  it will work for some bow making projects if you go slow - for board bows, and making pin nocks, arrow making etc.  I ended up buying a 14" saw pretty quick.  If you are planning on roughing out stave bows, and heavier work,  you will probably want more saw.  The little 1/4 blade that came on my little band saw was about worthless.  If you do opt for the  9" saw, get the widest blade that will fit and get the 4 tpi blades.  It will come in handy if that is all you can afford.  Been there and done that.