It is not possible to buy one "out of the box" as far as I know. I would budget at least 2 hours of overhead to learn the basics (it's a lot easier nowadays the

It is not possible to buy one "out of the box" as far as I know. I would budget at least 2 hours of overhead to learn the basics (it's a lot easier nowadays then it used to be). If every part you pick is 100% compatible, you'll have a much better time; getting unsupported parts working is a pretty big headache.