Depends on the type of stand you're looking for. Stands range from ~$80–500. The cost is usually pretty closely associated with the quality. I would mount on the ceiling, but that's just me (and my expert status is questionable).
In terms of bags, Outslayer is a pretty reputable brand for MT bags. That said, really any bag that is cloth-filled should do the job. If you're on the East Coast, you may want to check out KO Fight Gear, as well. For a 6ft MT bag you're looking at well over $200 for the bag because of shipping