Your legal fees to file would run more that just paying off what you owe. What an adult would do is get a second job for the extra cash, and find ways to reduce those other "bills" for a while so this bad debt can get paid off. Oh, and they would learn from this and not make the same mistake again.
You do not owe enough to file a BK.
It is also unlikely that you would ever be approved for a BK if this is the reason for the need.
Go find someone to give you a personal loan to pay the casino in full.
Go find a new job (2nd? 3rd?)
Sell stuff.
Contact Gamblers Annoymous to see if they have ways to help.
legal fees for chapter 13 cost much more than $2,250
p.s. - do yourself a favor and delete your question; you have admitted to writing checks with the full knowledge there were insufficient funds - in some states, that's a crime.
You might end up in Jail for fraud...this was bank fraud for writing checks that couldn't be cashed.
Good luck not having another bank account for the next decade.
You better hope they don't call the District Attorney and press charges. What you did is fraud and could get you jail time. Claiming bankruptcy won't save your criminal butt!