You want the gl inet brume 2 and the gli inet beryl ax.

The router is the brume. Access point is the beryl ax (which can also be a router in its own right if you wanted).

Both dont share data. Both are 100% open source. You can replace the access point with the wifj 7 version at a later date without changing router settings. Should be able to get them both for 140 total. Available on amazon. Mine have been going for 3 years solid. Easily meets your speed requirements.

This is the open source and much cheaper equivalent to Unifi, and its fantastic