The price is very limiting... $120 including radio and engine? You can barely get a decent 4-ch radio for that.
durrable and cheap airframe... look at
www.spadtothebone.com. There's electric power versions showing up now too. (plus some designs easilly convert to electric using foamboard to replace the coroplast... foamboard is lighter.)
The airplane can be made waterproof... the radio... not so easy. Try not to hit the water. (until you have a float-plane... [img]i/expressions/face-icon-small-wink.gif[/img] )