Something of note:
If you're desperate to not pay so much for a hotel, look to Santa Cruz. Scotts Valley is tricky, but the price for the Best Western is a bit much (about the same $100 you'd already be paying) and the Hilton is a freaking CASTLE. Santa Cruz, on the other hand, has a SLEW of very cheap hotels (though certainly not the best), and it's not a far reach to take the HW17 Express from Santa Cruz to San Jose. Ultimately, if you pay low at the hotels and buy Day passes for the VTA Bus every day, you could save a few bucks grand total.
That's if you're REALLY scrapin', though.