Is this a good laptop for calculations / editing and is it future proof?

GTX 1070 (8GB)

i7-8750H (6 cores \ 3.9GHz [Turbo])

17.3 inch 1080p display (1920 x 1080 [120Hz])

256GB SSD

1TB HDD

and which power supply (watt, brand etc.) would be appropriate for such a laptop?

How much does it all cost together?

Yeah, that's ok that part.

With the power supply you have to look which connection it has and how many volts the original power supply has.

1800 euro

I'm just seeing the thing cost 1800 euro. This is a complete rip-off!