That is a really small space....but it you're creative, you could probably make it work. The good part is that it's not too expensive and could give you the studio experience without sending you to the poor house.
One idea that strikes me, is using the space primarily as a sales office and mini-studio. Many of the successful studio designs, are geared just as much to sales, as they are to shooting. They have a nice reception area (plenty of opportunity to show of some large prints), maybe they have a more private meeting area and maybe even a separate sales area etc.
This looks like a nice building and space and I think it might be impressive enough to help clients book you. But if you pack it full of studio gear, then it just might look a bit more 'small potatoes'...if you know what I mean.
In other words, I think that a goal might be, to use this as your sales & administration space, but shoot somewhere else. That might work well if you do a lot of your shooting outdoors...but I do also see that you are looking for an indoor place to shoot as well. So if my idea for the usage of this space did work, then you would/could find another (bigger) space to shoot...and it wouldn't necessarily have to look fancy or be in such a good location, because you would already have impressed and booked the clients.
I sort of know a photographer who rented a similar space in his town's downtown district. He only used the space for impressing, booking and selling clients. Plus, the storefront was a good way to exert a presence in the town. He is mainly a wedding photographer, so he didn't really need the space for studio shooting.
As far as opening a studio, in general....the important thing is that you can expect/generate a steady stream of clients. I've seen a few photographers open studios, and they have had great success right away...especially if they have a large client base that they can count on for business right away. One idea was to throw a party for all their clients (and friends etc) so that everyone was aware that they had opened the studio. That's all great...but the trouble comes a few months later when all your clients are up to date with their photo needs and you're struggling to generate new clients. Then it comes to a decision of whether to start dumping money into advertising & marketing...and that, on top of the studio costs, can really run you dry.
So besides the monthly cost of the space, you should also consider the costs of what you may have to do, to justify the original cost of the space. So $365 per month is one thing, but for example, you may have to spend $1200 per month on marketing, in order to get that steady stream of clients that you may need.