You can buy a skeleton (3mil health) dummy from crafters or in traders for roughly 80-100k gold on ps4 na(last I've seen). Or you could join a guild with a guildhall. There's also a quest in clockwork city that gets you a weak dummy(Only 250k health).
If you would like I can send you a guild invite( it's a laid back group focused on making friends and having fun.) We have crafters that can make them as well as several houses open to the guild that have a variety of dummies ranging from the small skeletons to the trial ones, along with crafting stations.(no all but the hall is growing)