I think I agree with you, there are so many different spiders I want to buy, I keep discovering more and I find my number has crept up quite a bit more than intended with freebies lol. But luckily I am handling it well haven’t felt overwhelmed yet, the feeders are tripping me up some but other than that I’m good.I like your setups.
I'm keeping 5 tarantulas max at the same time (at least so far). That's a good balanced number for me, I've found. I still get sufficient variety, but I don't need to assign a whole separate room for them all. I also like to keep them in a bit larger enclosures than on average, and I can still fit 5 in my home without issues. My home is full of plants, so I'm already short for space as is.
I also don't want this hobby to become too much work for me, it's one of the reasons I started keeping tarantulas in the first place.