Way 1. Get in. Get out within 72hrs. or less with great friends who take pity on my financially Challanged Self. Sorry I was speaking for me if that last sentence doesn't help you theeeeen apologies. The rest of this is way more useful hopefully.
Way 2. How it was done by yours truly here was to bust up in there around tax time. It's nice in Spring.
Way 3. Piece mealin' one way flights there and one way flights back home to save a buck.
Way 4... Almost always get away from The World Famous Strip to buy anything like beer and snacks. Even if you're staying on said Strip.
Fancy ass CVS. Skip it. Go with one not on "The Strip" because $30 bucks for 30 Bud Lights suck and blow. And not in the Fun way.
Way 5. For Free drinks by simply playing games on the floor of the Casino, most games that is. The Penny Slots might be a challenge to get a waiter or waitress over. Forget what I said about $30 bucks for 30 beers sucking. Try a Miller and Bud Light for $15 for 2 bottles on the Casino Floor. Ouch. Thanks for picking up that tab Rocky!
Way 6. All the big hotels you can walk into for food and of course gambling. you just might get checked for ID when going up to the rooms. Above get the Lamb Burger for $20 with fries and drink at Cosmo across from the Day/Night Club. Club Prices Vary just don't buy a ticket off the street. They might not be legit.
Way 7. Stay off The Strip in damn near any other part of that town. Just littarly up the road in long but still walking distance I hit up the Hooters Hotel Across the street of the world famous MGM Grand. Hooters has the wings too. Get those. And watch these videos and search for some more on youtube. Just type in Vegas they'll know what you're looking for.
Of course this all just a few suggestions there's a million ways to go about Vegas. And remember the house always wins but you you'll have a shot at a good time at least.