You cooouuuld, buy a solo Quicksilver Sword Endless spell. It is around $10 USD on ebay, but you do actually get a fair amount of swords to work with!
As for training dummies, I actually just use the models I'm painting... guess I'm fortunate most of them turn out okay lol. Buut, I definitely ruined Durthu this way, so I cannot really advise it lol.