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I'm stuck in a really difficult spot in my office and I'm not sure if I should start looking elsewhere. Tldr; there's no defined hierarchy or career path in the web department leaving no position to be promoted to.

We've got 2 offices with now 150+ employees and for the last 2 years I've basically inherited the responsibilities of an IT manager. Planning and deploying our networks, firewall config, VPN setup, keeping users' systems functional, track equipment, order/setup systems for new employees. All of this in addition to my original job description of web developer, which has basically turned into maintaining client WordPress sites while the other developer builds sites.

I've spoken to our CTO (my supervisor) about how much time the IT stuff actually takes and some of my suggestions for the future to make sure we protect ourselves and future proof our systems the best we can and one of my suggestions was that we needed to create the IT manager position because he is usually in meetings or building out API integrations. He's behind the idea, or at least says so to me, but leadership doesn't believe it's needed because we "manage just fine as it is" (this does require 60 hours a week of work along with much automation that I wrote/built). But we're trying to open a 3rd office which means another 50+ employees and systems to manage as well as more websites as we sign more clients.

My pay has never been satisfactory where I am and based on the maximum raise each year it would take me another 10 years to make what I would like (that's calculating without cost of living increase) but they claim this is because I lack a formal degree (self taught). I love most of the people I work with, don't really have an issue with any of them (outside that they're stupid but that I can let that slide if they're trying), and they work with me and my health issues which cause me to miss significantly more office time than I would like. I've been here for 4 years and I've learned a lot but I don't feel like there's any upward mobility here. The only position I see in my department above me is the CTO (or possibly the new PM but that's not a position I want) and he's not going anywhere, and I firmly believe we need someone who can full-time stay on top of our infrastructure before we expand further.

I fantasize occasionally about leaving and finding something else, and there are plenty of opportunities online that I appear qualified for which pay more, but I worry that I'd be trading in something that really isn't all that bad for something that sucks and the only real perk is more money. I'd hate to go somewhere else and start back at the bottom again and have to prove myself yet again.