If it is for a prototype, why not just use the Django admin? I would not run a full-on SaaS site with the built-in admin, but I would be happy enough to use it

If it is for a prototype, why not just use the Django admin? I would not run a full-on SaaS site with the built-in admin, but I would be happy enough to use it to demo back-end functionality. There might be use-cases which would prevent this (e.g. row-level permissions are impossible - if you can delete one FooObject, you can delete them all), but if you can avoid these it should be ok.