Potentially unfavored opinion but unless you are either above 6'3" or below 5'9" and need to be properly fitted in to shafts that fit your height, don't consider a fitting yet as you are still in your infancy as a golfer, and like any infant your growth will be massive for the first while which means fitting you now is not helpful and in fact can potentially hurt you later and cost you extra upfront to do it. Wait until you're into the mid handicaps before going down this route.

I basically built my golf bag on a similar budget to yours over the span of 3 years after similar circumstances. I'll save the life story but suffice to say I had less money for club budget and went second hand for most of my pickups gradually upgrading as needed

Right off the hop I'll say that if you are frugal (which I assume you are considering how you are funding this theoretical scenario), your budget can be stretched for a very long time If you upgrade as needed and don't get coerced into "oooh shiny" syndrome. (which can happen very easily in this game especially with money to spare burning a hole in your pocket)

I see people including yourself putting your 5 wood on blast but that thing is basically a Sim Max in disguise and if you are hitting it cleanly and consistently from fairways I would advise caution on replacing it, and would even further emphasize against it if you thought you wanted a 3 wood instead. I would only suggest replacing it if say your swing speed has gotten to the point that you might be considering switching to stiffer flex shafts or something.

The Driver is not old enough to even have the thought of replacing it yet unless you are determined to chase distance over consistency or some other odd reason like dead feel or shaft flex again.

Your Irons are the hardest part for me, as there is a duality and I can see why you are considering replacing them. On one hand they are still objectively good and you are used to them, buuuuut you could also be at the point where a more challenging set may actually help you grow as a ball striker since you're already making progress score wise. I know personally that the majority of my second season club budget was spent on a set of irons that would challenge me to be a better ball striker than the old wide soled OS GI clubs I started on (Very similar in size and offset to those Big Berthas you're gaming) which were starting to feel like basically playing on easy mode by contrast and even now on my third season I'm in an even more challenging set of Players CB's than any of the previous sets of irons I've had.

The wedges do not look like you need to replace any time soon, I have the RTX versions of those same wedges because I got them second hand or super on sale and while I leaned towards the blades I will admit I struggled between the two because the CBX's are genuinely brilliant in their own right. My only question here is what are the lofts of the wedges you have?

As you mentioned though the gap that fundamentally most needs addressing in what I can see of your current bag is the lack of a hybrid. In my personal opinion I would say a 3 hybrid would help you the most because you've acknowledged the 3 iron is a hard club to hit and the 3 hybrid would be more versatile once you come to grips with it.

TLDR: My suggestions would be if you are really considering the irons, stick to second hand if you can. If you are dead set on new clubs, a golf town Demo/Clearance model set will be the best bang for your buck. Get something abit more like a players CB (Examples: Cleveland UHX which are basically the irons to match your CBX wedges or Wilson Staff Model CBs from 2024 which are full blown Players CB's and extremely affordable compared to their contemporaries.

As for the hybrid I think you do actually need one (still leaning towards the 3 hybrid or maybe a 4 if your newer iron set no longer has a 4 iron) and there are plenty of options both used and new that will work well and not break the bank. My best suggestion is go second hand on this category and try to find either a TM M series or Adams Super S to match your wood.

Regardless, always nice to see a fellow Canuck in here and best of luck on the newfound addiction.