There's definitely still money to be made, but are you considering new build or purchasing an existing facility? There are a ton of value-add opportunities out there for self storage, which makes purchasing an existing facility a much better option in my opinion. Obviously a lot of facilities are overpriced right now, but finding absentee owners with dilapidated facilities isn't super difficult. The main advantage purchasing an existing facility provides is some income while you are stabilizing the property; even if the owner only has 30% occupancy, that's better than starting from scratch with debt service payments. I know others may disagree, and that's fine.
I own one facility locally, and am looking to purchase another locally within the next 6-8 months. I am only interested in investing in facilities within a 20 minute drive from me, but I know there are a lot of self-storage operators making good money remotely by having kiosk systems in place. I just need to be more hands-on with my investments. I cut the grass, plow the snow, etc.