I´m not sure if it would be enough machine for heavy loads but this seems to be the best for that amount:
hope it helps
You will need to spend a lot more than that for any kind of laptop for Editing, especially for Premier, even some of the Dell Work stations costing many thousands of $$$ cant do it very well.
I think a Metabox Pro Workstation laptop would be the way to go, which are custom built according to your needs and budget.
or one of the very high end Clevo Gaming Laptops from here, again you can find a local stockist and build it to your own specs from their parts list.