Got my mossberg 500 from a store having a sale on them for $150....
I say the first year you should really see if you could borrow a gun from someone and spend ALL $175 on gear, and then the next year buy the gun. I got some cabelas 8-point hunting boots with steel shank bottoms and gore-tex with 1000 gram thinsulate for $80. If you have a store called Big R, like some are scattered around the midwest, you need to hit up there day after thanksgiving sale for some camo cold weather clothing. In pontiac, IL they were selling super cheap. I didnt buy any cause i didnt need them at the time, but really warm insulated bibs were selling for like $24 and the coats were about the same. I bought my new gloves this year from Dick's and they are gore-tex and 40 gram thinsulate for $20. Besides that, all you need is the orange stocking cap and vest which will run you about $10 total at Wal-mart. Buy a couple boxes of slugs for about $15 and you should be ready to go. Thats $80 for boots, around $50 for camo warm clothes, $20 for nice gloves, $10 for orange, and $15 for shells......which is a grand total of $175!! Wow, thats really messed up because i honestly thought I was gonna be way less and gave the acurate prices......hmmmm......honesty works??

Anyways....save up the money for next year to try to buy a used gun and a scope....if you can get around $200 I would say you have a decent shot at a pump shotgun with a slug barrel. Good Luck!