Trust me, even if it's not about money or space, there's always going to be something to get in the way.
I'm a single guy who has one adult son (turns 22 this week) that still lives at home (and another 25 year old son who has been out for about 2-3 years now). I'm extremely fortunate to have a 4,000 square foot home with plenty of space that only 2 of us live in. I have beautiful built-in bookshelves throughout the house that are perfect for figure displays. However I work 70+ hours per week for my primary day job (leading a team of a data scientists for a hospital chain) and then as a side gig I run a collectibles business out of my home. Plus I make sure that I work out a minimum of one hour per day every single day. My house is packed to the gills with inventory. I have almost every figure that I could ever want for my own collection, but I have almost no time to actually work on displays or actually enjoy those figures. Most of what I've bought in the past several years has never even gotten opened.
I turned 50 this year. Retirement is no where on my radar yet despite saving plenty for it my entire life after starting my career as a financial advisor and stock broker. I just have very little interest in the concept at the current time. I hope to work until at least 70, mental and physical health permitting. However, I often wonder why I keep buying things that I never take the time to enjoy. I took on the side business because I love the hobby so much, but I never realized that the time used on it would essentially replace my time actually enjoying the hobby.
Like I said, there's always going to be "something" getting in the way for all of us. I've often wanted to start a YouTube channel to coincide with my side gig to do reviews, lists, engage in discussions and such, but I just simply don't have the time. Without trying to sound like an arrogant prick, I'm a gifted public speaker and presenter (it's just what I do) with the energy and voice to pull off a YouTube channel really well, but I simply don't have the time to put into it. I'd also really love to get heavily into 3-D printing to make those beautiful diorama displays that we all want, both for myself and to sell, but I just simply don't have the time.
This is even after my kids are grown and I have no significant other to try to keep happy (and zero interest in ever having another one).
All I'm saying is that by the time you have the space that you want, you might find that completely different things become an obstacle. Enjoy your collection when you can, however you can!