honestly i know nothing about snowboards but i did pick up some stuff at Levelninesports.com. there are other on-line sites that sell 'inexpensive' which may mean cheap but a few questions help. The board i bought for my daughter was from a defunct company and while not top notch, was/is effectively disposable if she uses it more than half a dozen times. honestly, it and no-name bindings were around $140 .. ok, i know some will say this is crazy and crap, but i have had a couple of long time boarders (an instructor at Steamboat too) say they thought they were pretty decent board and bindings. The bindings i figure are the weakest link as I can see where if they break, there wouldn't be much one can do.
I only bought em as I felt comfortable with Level Nines comments on them as well as online comments. Levelninesports, Evogear, local places too have name brands as well.
My local shop had Burton Mint boots, nothing overly fancy but they were only (are now too) $80 bucks as the season in the midwest is closing. their Burton Boards are marked down nearly 1/2 too, many were last yr but who cares .. nice boards at around $150 - $200 and they will knock a few dollars off if were to buy bindings, boots and the board.
As an FYI, my daughter is only weighing in at around 110lbs fully dressed out carrying lunch too, so board wise, she shouldn't be too rough on em. One other item i bought, for $30/40 i bought some gloves with wrist guards, she's now using them while skiing and likes them as their mittens with a glove liner. Given the rate of falling upon learning, figured it was a cheap investment to lower risk of injury.
finally, besides yr end closeouts now going on, many resorts will (though you will need to stand in line again) offer lessons and lift and toss in the board rental for free, least wise, what i've noted. My daughter did a Steamboat lesson which for $29 dollars, picked up the lift ticket. This was a lower level class but i have noted many resorts offering some deal if you ask.