Upgrading Dell Desktops GPU

I've recently taken to looking to getting a more powerful but cheap gaming setup. I expect that for a Desktop setup its going to be at least £1000+ for the specs I'm looking at. Considering that I'm looking at a GPU of at least RTX 3050 or higher spec and preferably a high level i5 or as listed in the link below an i7 11th Gen (compatible with RTX 30 Series cards) if I were to buy a desktop it would need to be the correct size to fit in the desktop without removing required components. Since I know the desktop already comes with Integrated UHD 750 Graphics I already know a dedicated and integrated GPU pairing is possible. The main issue I'm considering is that since this desktop isn't exactly designed for gaming will a new cooling system or further venting slats need to be installed to allow the computer to run well enough so it doesn't overheat considering that RTX 30 cards will generate lots of GPU heat and running games will also generate CPU heat (already accounted for since the CPU I am planning to keep). What system alteration aside from cooling (if necessary) would be necessary for optimal performance with minimum an RTX 3050 GPU installation? https://deals.dell.com/en-us/productdetail/bce4 (original idea) Further considerations below: https://deals.dell.com/en-us/productdetail/bcek https://deals.dell.com/en-us/productdetail/bcgg https://deals.dell.com/en-us/productdetail/bceq https://deals.dell.com/en-us/productdetail/bpqb https://deals.dell.com/en-us/productdetail/bce4