Can i buy a bran new for Wheeler on ssi? ? ?

i am on ssi supplement income because of my anxiety problems and i don't leev the yard much and i hav been thinking about buying a bran new for Wheeler is it legal for me to buy a bran new for weeler and use the money that i get from ssi to pay for my mouthly payment??? or would the the goverment stop paying me or somthing if i do that?????