I had something like 4000 rupees at the end, with upgraded everything. And that's before I realized Beetle gives you a 50% off discount for saving his bug
Though I read the prize for winning the 12 boss rush is 9,900 rupees so, um, yeah there isn't really a point to all that money.
For the next game I hope they expand crafting. While only using the one sword is understandable for this game, different swords, different tunics with different effects, boots to change stamina properties, and other super RPG-lite elements would be nice. Mostly just keep the RPG elements practical and noticeable instead of statzzz.
That one boss where you pick up his large sword got me thinking that they could have done a lot more with swords. Length, handedness, weight/speed, etc. Like a two handed wouldn't allow for a shield, requiring you to pull off more Wii Sports Resort like motions for defense, or slashing back enemy projectiles.
I'm dangerously close to saying "what Zelda can learn from Dark Souls" and this also probably doesn't need to be spoiler'd