TBH, if you aren't picky about card condition, getting MP/HP Trops instead of NM/SP will save a couple hundred bucks on it's own. I did that, and was pretty satisfied with what I got. Going this way on FoW and Berserk would save a decent amount of money too.
Note: SCG currently(for the next ~12 hours) has a Legacy/Vintage staple 15% off sale going on. It includes Tropical Island and Force of Will.
I'd also recommend going with the white splash, instead of the utility land sideboard. Cutting Karakas and a Wasteland will shave a couple hundred more off the deck(some people also substitute a Savanna for one of the Tropical Islands when they do this, which would be another $100 or so off). These are choices that some people consider correct regardless of budget, so they are definitely good ways to cut costs.
Here's a list that I quickly slapped together that comes up to less than $1700. With some bargain hunting, you could probably get it down to $1500.