Some good things to know you wrote.
The thread is also got some extra suggestions.
All good stuff to consider, but before starting any comparisons.
I would like to ask you about some preferences as it helps to get any not mentioned requirement clear.
Could you humor me for a bit? Itās not going to be as the Dahua post I swear.
Did you intend on to install all network cabling yourself and end connectors?
When the DSL finally is done and keeping the 5g, do you want the router to have a form or automatic fail over to 5g, when a DSL outage is detected?
Oh back to network cable, do you know which category youāll get as only going 2.5gbs can be done easy on cat5e.
Getting more expensive cable might not seem to make sense, But even cost does make sense to get better cable to install. If you install better cable now you donāt have to reinstall it down the line. When you could wat 10gbe.
I think cat6a will be my advice but not if you need a shielded version.
Wifi with multiple APs can be setup in passive and active ways, passive is sharing a ssid just getting of range until the connection drops and connect to a new one.
Active modes come in 2 wifi optional standards. 802.11r fast roaming is the oldest, and is just the passive mode but the APs communicant signal strength and when a client passes a threshold the client has a chance to switch itself and otherwise the APs for a handover.
Newest standard is called 802.11s mesh, and allows for zero connection loss at handover because check the wiki.
So I recommend going for mesh, fast roam is still used sometimes but mesh wins.
Last one: having a OpenWRT or Opensens router will give the most freedom and customization, but getting started with any off them will require a dive in the deep and a investment in time to learn it.
The other way around Ubiquiti has a less āfreeā experience but uses the bit of control to offer a more guided and user friendly setup.
Would one or the other have your preference or disqualification?
Maybe nether.
I recently checked the differences in features between ubiquiti and pfsense.
It was almost on pair, PFsense had more in depth setting and add-ons you can setup you own IDS/IPS, Ubiquity has the some feature same application I happen to know.
But you can set full custom filters on PFsense, ubiquiti has saved you the trouble of finding them and made is list with selecte subject and option.