Enable Django admin functionality at frontend with inlines
I would suggest that you used the admin forms (in your views) or admin views (on custom urls) and just altering the admin templates, or even just loading the admin javascript, you can find it into the admin templates.
This task requires the support on a both frontend and backend sides.
It seems the simplest way is the using of django-admin forms itself on frontend if this is acceptable for you.
Any django admin form recognizes the ?_popup=1 parameter in the URL to suppresses the admin page decorations and serve just a form. All necessary JavaScript and CSS styles will be included. So admin forms could be shown on frontend in the iframe. A small hacking around on JavaScript-level is still required to adjust a size of iframe to the form and notify the page then form is closed.