Just to respond, I don't know. I could speculate that maybe he brought one, it died, he left it there. Brought another, same situation, etc. Then at some point he had his own, better machine, and he used that. These little devices have been around for a while, break or become cranky after a few years, and get put aside. For all we know, one of them might be 8 or 9 years old.
My even bigger point is that I can't understand the big deal that was being made over them, and the idea that it was somehow an indication of Dylan's character that there were three at his father's house. That said, I admit to feeling protective of Dylan at this point, though I don't know him personally, so maybe I'm missing something.
ETA: Re: lending. Again, I'm not sure these machines were lent to him, and that the lenders wanted them back. I think they may have been given to Dylan after other people upgraded - the hand me down story of the younger child.
IMO.
Thank you.