On the contrary mate, I reckon kayak fishing is relatively inexpensive. Or at least, it certainly can be. But yep, I do know how bike riding can get as an obsession. This is actually the cheapest bike I've owned since being a kid. It was a great buy at $750. The frame is great, hydraulic discs, I like the handle bats and seat. Slowly but surely everything else will go though.  
 
Not sure what I'm going to upgrade the other components with. I'll use it a bit before deciding in what order I'll start upgrading.