Wire dipsys put the most and biggest fish in my boat most trips. Id set two of them up for sure. You can do it fairly cheap using a standard dipsy rod, blood run wire, and a twill tip. Get something halfway decent for the reel though, you need a good drag on these setups.
Next, I'd find a used manual down rigger. If you're just getting into this, and in a 17ftr, my guess is you won't be fishing super deep very often. If you have at least one rigger, you can run a probe. I fought this for years, but finally got one and it absolutely helps. Both eliminates water and confirms speed, even if you think you know how to read your gear.
Depending on what you pay for all that stuff, you might even end up with a couple hundred to spare. If you do, I'd setup two weighted lines for boards. A 5 color lead and 150 copper are a good start. You can always add snap weights to get them deeper if need be.
You can cover most of your bases with those rods and throw out some of the other stuff you already have for high lines and such.
Good luck, but be warned, if you catch the bug of big water trolling $1500 will be just the start of a downward spiral ;)