Z, shop around online. There are LOTS of places for supplies etc. Who to buy from is almost a discussion in itself. Just for something to look at take a look at
www.midwestsupplies.com They are definitely not the only game in town!, but it will give you a little idea on whats out there. Glass carboys are pretty spendy, plus shipping them.
Consider the Better Bottle brand, they are plastic, but a type of plastic that won't be affected from the acids and alcohol in wine or beer.
www.better-bottle.com This is the manufactures website, but almost any supply source will carry them. I just bought 2 3 gallon bottles for $15 a piece. The store made me a deal but they only run about 20 each, glass you will pay close to thirty.
I too ferment in a Home Depot bucket, sort of. Thats why I went with 3 gallon size "carboys". Then I can ferment 4 gallons or so and still have a container to rack it into and put the excess in a gallon container for topping off or "testing" LOL.
Plus I live in a small cabin so room is an issue. The better bottles are square, first of all, and, a whole lot easier to handle. Its my first go with them, so I am not making a sales pitch. But I have heard lots of good things about them and it may be something for you to consider.
Airlocks ARE cheap, but if you had to, and I have, many times. Run a tube through the cab and send it into a jar of sanitized water. It can burp, but can't burp back. Called a blow by tube. Otheres have used them, same effect.
The whole brew it yourself thing doesn't have to be expensive. But having the right equipment sure makes it alot easier. Besides, aside from your juices and additives, EVERYTHING else is reusable, so consider it an investment. LOL, right, and don't let the wife know how much your really spending on it, unless she's a wine drinker herself!!
Take Care, Good Luck
Troy