It's not an expensive hobby to get into any more. For less than the price of a mediocre DLSR lens, you can get a pretty wicked set-up for an amateur. This is pretty much the exact setup I have:
http://www.amazon.com/Celestron-NexS.../dp/B000GUFOC8
Albeit I added on GPS capability , and a bunch of eyepieces, and software for controlling the scope from my laptop, and adapters to hook up my DSLR. But for around $2-2500 all-in, unless you want to publish photos to National Geographic, or OMNI, you'll have everything you need for a long long time.