An alternative to this is to use a Form. You can have a model that produces the form configuration (relations for each field in the form for example) and produce this Form on request.

Then, when the form is saved, take the resulting dictionary and save it to a JSONField in a 'result' model. If you want to re-display the form with the results, just create the form from the configuration model and add the data from the result model.

I've had great results with this technique, and you can model any field except a foreign key. Django forms provides the validation, and the backing storage is dynamic so you can change fields easily. It seems less fragile than creating models like this article proposes.