I haven't really stayed at any kind of motels in Anaheim. Unless it's the hostel in Anaheim that's more a few hostel rooms combined with a motel. It was pretty nice although I had a really weird experience in one of the hostel rooms with a fellow guest who eventually left before anyone called for police.
If it's not too far away for you, in Buena Park it's not so bad. We had a hard time finding anything affordable for one visit (around New Year's) and stayed at the Fairfield Inn on Orangethorpe. It was maybe a 10 minute drive to
Disneyland since it's almost right there to I-5. Not exactly that similar, but it was affordable and had a decent complimentary breakfast. The people we met at breakfast seemed to be more visiting family and/or a lot going to Knott's Berry Farm. ART also stops right in front, although it's on the street and not into the parking lot.
You can look around for other motel style accommodations, but I guess there are a couple of Motel 6 locations in Anaheim.
But Anaheim can have some great values. In previous stays we were at the Hilton Anaheim where it was $99 or $59 a night or the Sheraton for $99 a night, although they all charged for parking. And the Sheraton has limited parking. The convention center hotels can be really inexpensive if there's no major conventions.