They do have their own “dollar” (known as Bahamian dollar), its interchangeable with US Dollar as its a 1:1 peg meaning value remains the same (B$100 also equates to $100) but they have a bill for $1/2 (50c), so there are 8 denominations & it’s a strong currency with a caveat (it’s closed, it can’t be exchanged outside the country). I know it’s a rich country not too distant from Florida, have you been there before? If so, what is it like?
Travel ain’t cheap these days. Are you willing to plan ahead, stay in hostels, and avoid tourist traps? Could be pretty affordable. Is it a spur of the moment splurge? Say goodbye to your wallet.