If you really get into it sure your wallet is going to take a hit. I have 100+ dives and still no computer, no BC, etc. Just mask, fins, snorkel, wetsuit and a knife. Oh, Camera - that's where the money hit comes in. 1000 bucks to dip your toe and it only goes up from there. OP needs to focus on being comfortable with diving first.
It's like golf, it seems expensive at first because you're dropping money everywhere...and then you learn to play smart.
I bought an underwater digital camera for around $300. Certainly not great quality, but good enough to take some cool photos that I could put up on Facebook.
Once you have all the gear the main expense associated with diving is travel. I knew a guy who was lucky enough to live near some great dive sites in Florida, and he said once he had his equipment it was actually a pretty affordable hobby for him. Unfortunately I live in Maryland and the prospect of diving in cold, dark quarries doesn't appeal to me, so scuba diving remains a pricey passtime.