Dual Band Client Mode, Gigabit Eth, Seeking Recommendation

Hardware Questions and Recommendations
1

Hi, I have 3 computers that I want to connect to a 5/2.4 wifi network, and get the best performance, id also like to do qos or bandwidth limitation, so 1 doesnt hog the available bw. It just for local network traffic, file transfers and rtsp streaming. Im in a Australia and looking for below $150aud , preferably <$100aud, new or used.

Want to bridge the 2.4 and 5 connections for increased performance, the off the shelf access points/ routers ive looked at with client mode, only support 2.4 or 5ghz when in client mode, not both, so looking like i will need openwrt.

Figured i need 1gbps eth ports to get the throughput from the wifi.

2

Attempting that brings more pain than gain, aside from 5 GHz being much faster than 2.4 GHz anyways (so all the trouble isn't worth it, just to add the miserable (in comparison) speeds 2.4 GHz would provide).

3

Thats nice to hear, Ive been wondering if im even going in the right direction....