I think having some type of home lab or access to a virtual lab is a natural extension for anyone that works and loves IT. I know there are some who can't afford much and that is understandable. It may also be a function of how much you already know, type of home environment you have, and whether you plan on switching jobs at some point.
My home lab is modest but I run and host vm's, have storage, and manage 2 websites where i did everything through Linux. I plan on doing more, a lot more. I plan on putting a small rack in, getting a proper firewall, a large switch, a good router, keep my wiki updated and so forth. There is so much I want to know about I will always have things to tinker around with at home even though I may not get to at work. That still won't stop me as i am still low end IT moneywise. I want to show future employers what i do at home and how much storage I will have. I want to see their faces when i do more than they do at work and possibly have more storage lol. That will also come with being able to explain all those technologies whether it be vm's I host, websites I write for, or storage technologies I can show that I use. It is just something I want to do as long as I can.