[Demiurge]

"Fat" abstract models is the way to go if you have logic that operates on the data. It's not even fat. There were fields assigned values in the example. That is exactly what model methods should do.

"Fat" abstract forms is the way to go if your forms have crispy layouts, placeholder initializers, or other stuff that that directly has to do with forms.

Views can be easily split into categorical files and shouldn't contain much logic other than bringing models and presentation together.

Sounds like thinking about what you're doing is the way to go to not have code get out of hand.