I hear you on the space thing! :). Apartment dweller here (try to keep this story short) - spent my last few months in Ontario selling, gifting and donating everything that I owned as I planned to emigrate to Australia. (decided Aus isn’t for me in the long run, hence why I’m now in Vancouver) - wish I would have come out here 20 years ago! Re-building my culinary toolkit since I landed here just over two years ago - I picked up an APC before I even thought about a slow cooker (and then picked up an Insta-Pot, as you know, Swiss army knife device means fewer items in the cupboard). :). Minimalist cooking.
Take it back to CostCo, get another one at a place with a healthy return policy (30 days) to make sure you’re sold.
How long did you cook your steaks? The magic that the APC does to steaks (IMHO) is the “low and slow” methodology (southern BBQ) - take your time. I cook my steaks for 6-8 hours at 130F. That extra time really tenderizes the meat. (and whatever juices you lose in the bag, you could put into a sauce - peppercorn or blue cheese?)
Steak, chicken, roasts (pork or otherwise), chops and (obviously) what the French created this method for in the first place (what, 60 years ago?) - Fish!
Keep a journal…trust me, in time, you’ll really appreciate what it can do for meat.
The eggs and veggies…yeah, I don’t get it either.
Oh, on the container front. I had a Cambro that I cut a hole in the sealed lid for. I liked it as I could see what’s going on in the cook (handy if you start using the sous vide bath for creme brûlée - those damn little jars are bloody temperamental!) - BUT, doing it over again (and being an apartment dweller) I’d go for the Coleman stacker coolers. They have 24 and 48 can stacker coolers - same lid, double the depth. Here’s the play. Buy both. Get yourself a 2 3/8" hole saw and cut a hole in the corner of one of those lids. Now, either cooler can be a sous vide vessel or a cooler, depending on which lid you have on it!
Coming up to temp and holding it (with minimal impact on your electric bill) is exponentially better with an insulated vessel.
Use the search function up top - there’s no end of people discussing what they’ve done to make a better vessel (but my money will be on the Coleman stacker coolers…might have to run down to Walmart in the US to get the best deal on them though - post-covid of course)
What I’m using currently? Just a big stock pot. Next place will have more storage space (and a storage locker for seasonal items) - then I’ll pick up the stackers on a road trip to the US.
Oh, and when you cut the hole in the lid - the lid becomes your clamp for the APC - it just sits in the hole - it doesn’t need the clamp to hold it.