IMHO, If you can get the scroll saw and sander at the same time that would set you up pretty well especially if you have a dremmel. I have not built boats but I have built planes and those two tools is what I use the most. The other two I would get in this order band saw then drill press. You will use the band saw about as much as the scroll saw. Also Have you though about getting one of these sander instead?
http://www.axminster.co.uk/product-P...der-462327.htm