If you buy a camera and a lens used and later decide to sell you should get most of your money back if you bought at a fair price. This goes for 4x5 or 8x10.

If you want to shoot 8x10 you can pick up a battleship grey wooden Burke and James camera pretty cheap like a few hundred dollars. A 300mm f/5.6 lens in shutter can be had for about $300.00. Film holders in usable shape will run you $60.00 or more a piece for the later plastic versions. Wooden ones can be found cheaper. You can find a wooden Berlebach or metal Majestic tripod for less than $200 that will support an 8x10 camera.

What is going to get you is film costs. B&W isn't bad but color is expensive. You are going to burn through some film learning the process.

I shoot 8x10 b&w and 4x5 color. I own a 4x5 reducing back for my 8x10 camera.

If you really want to shoot 8x10 and can afford it then go for it. If you are unsure then start with 4x5.