Hello and welcome to the forum.
I can offer some advice, albeit, unprofessional - I am also just a hobbyist!
I have been using a single 10 frame brood boxes as well and have probably been watching some of the same videos that you have (university of Guelph).
As your climate is much warmer and offers more year-round nectar flows than ours, I think you can probably get by with a single 10 frame box or even a single 8 frame brood box.
You’ll have to be more proactive about swarm control but otherwise, I don’t see a lot of downside to single brood box management.
Perhaps, if you have extended dearths, you’ll have to manage the bees stores a little more carefully and consider the possibility you’d have to feed them during lean times.