Laravel Nova (https://nova.laravel.com) could get you pretty far. PHP is easy to hire for and scales easily.

It says $199 per site does that mean I've to pay for each user? I've like 1000+ users with revenues very much higher. I'll be using custom data wrangling, analysis and prediction. Will this be good. I'm currently looking at Django as it pretty solid and have Python to which I can use Python's data science libs to do all my stuff, but I've not found any example of beautiful dashboard ( should I create the dashboard as frontend after login rather than going to Django's admin??)

Thanks for the reply!!

Per site so long as it is a single domain name with 1000 users it is fine. I like it because it is attractive and easy to customize.

If you can get most of the work done in Python then the question becomes: does Python dynamically generate the data/results for your users or do you store the data somewhere and some other tool (PHP for example) can query it to present to the user?