Single network with DHCP and different bandwith speed rules

RouterOS General
1

Hello,
please suggest me how to implement following network at home:

  1. I have Mikrotik hAP AC connected to the Internet using pppoe.
  2. I have a PC and a TV connected to LAN via Ethernet.
  3. I have 2 TV Box’s supporting Chromecast connected to LAN using 5GHz WIFI
  4. I have some old laptops and old smartphones (family and friends who visiting me time to time) connected to LAN using 2.4GHz WIFI
  5. I have a WIFI Repeater connected to LAN using 2.4GHz WIFI to extend WIFI range at home through few concrete walls.
  6. I have new laptops and smartphones connected to LAN using 5GHz WIFI.

This setup works fine using default ‘Dual AP’ configuration of my Mikrotik. But I would like to go further and set the bandwidth limit for some clients. What I would like to do:

  1. Set no limit to TV Box’s and TV - they show online FHD TV.
  2. Set limit to PC and mobile devices connected to both 2.4GHz and 5GHz to save the bandwidth for TV Box’s and TV.

There are few issues that makes me stuck:

  1. There should be a single network because I’m using Chromecast feature between smartphones and TV Boxes.
  2. There should be DHCP because I have visitors who I would like to be connected to the same network.

I actually tried to create 3 WIFI (1x 2.4GHz, 1x 5GHz, 1x virtual 5GHz), with different queues to interfaces but it didn’t work because they were in the same bridge.
I tried to get them out of the bridge and set DHCP pools for each WIFI interface, let’s say:

WIFI1 - 192.168.88.2-192.168.88.10 with queue1 to that ip pool
WIFI2 - 192.168.88.11-192.168.88.20 with queue2 to that ip pool
WIFI3 - 192.168.88.21-192.168.88. 30 with queue3 to that ip pool

working in the same network 192.168.88.0/24 but it fails because of DHCP conflict.

Could anybody please suggest some solution?