Not sure if you pulled the trigger, but I was nervous to go from LTR to MTR. The question is what niches will support the MTR paradigm. I am in Pittsburgh and there are multiple large hospitals within 15 mins. I went to Vivian.com to browse the jobs to see if there is demand. If you keep your searches broad you can see which hospitals vs others in the area are seeking temp workers. I would check FurnishedFinder and their stats about what's available and prices. I think a good rule of thumb is LTR is 1x rent, MTR is 1.5-2x rent, and STR is 3x rent.
In addition to medical professionals, we also have college/grad students. Typically those are shorter stays as they are doing something for a couple months vs staying for the entire semester or year. Finally, there are digital nomads and some theater performers who need to stay for more than 30 days. That's been my experience and I'm really glad I pivoted, but your location might have other mid-term niches you can capitalize on (construction, business, etc). Facebook has mid-term rental groups for traveling nurses, etc. You can check to see what they say about your city. YMMV