The most cost effective way to get consistent and fast internet is over a wire. My rule is that if it doesn’t move, and if it has an ethernet port, it gets a wired connection. TVs, gaming Consoles, the laptop that lives on a desk/table…this stuff. Then the stuff that does move or can’t be wired to a switch can have the wireless bandwidth it needs. So, OP, you need a box of Cat5e spec UTP cable, a bunch of ends and the tool to put them on the cables you make, and a switch or two with 8 or more ports each. Next is to find wireless access points that are wifi6 and capable of covering your home. 2000sqft can usually be covered by a single unit of any top tier routers from most manufacturers. I’m partial to Asus for home use. After this, it’s a matter of configuration. If you have many neighbours, turn off the 2.4GHz band radio (if possible for the wireless-only clients). If you don’t have wifi coverage where you need it, add another WAP (NOT a mesh node) - it’ll be easy to deploy with a wired backbone infrastructure already in place.

Run the ethernet cable, add a switch to connect your two machines over 2 more wires and you will never experience internet problems, except perhaps with your phone.

Do you have an old router kicking around? If you do, it’s possible it may be reconfigured: Asus calls it a Media Bridge, where it becomes a wired switch with a wireless connection to a router. I did this for an old laptop whose wifi card died, and the user is thrilled with the speeds being ~3x what they were. No holes or fishing cable through walls required.

Sigh. There’s no way you’ll ever get 1Gbps wirelessly. None, ever, period. If you’ve a Cat5e cable run from the modem location in the basement, run a 2nd one. Place the AX router on the main floor (first ethernet cable) and then back down to a switch in the basement (2nd), and run more cables around the house from there. For a few hours and a couple hundred bucks, you’ve just added a few thousand dollars of resale value to your home in modernizing it to be networked.