I believe a little more analysis is needed.
1. Look up Airbnb, VRBO, and probably Airdna in your area. What are places similar to yours renting for? Also consider that with STR you are responsible for all the water/gas/sewer etc bills that you wouldn't normally be for in a LTR.
2. Is your place fully furnished and ready to go as an STR? Are you OK leaving all your furniture there with the expectation that everything will get wear, and things will get broken that need to be replaced? If it's not furnished, what do you think it would cost to do so?
3. If you sell, would you invest the difference in something else? If that would be real estate would you do a 1031 or flat out sell and buy. Consider if you would need to pay capital gains tax if you do sell...not sure the situation.
4. How passive do you want to have your investment? STR is going to yield more revenue, but it requires customer service, management of cleaners (or cleaning the place yourself), dealing with repairs or damage to the property after stays, initial setup of platforms, and continued inventory replenishment to keep the place stocked. Mind you, a lot of these you can systemize, but it takes time initially to set everything up and some management to maintain.
Also, I agree with Dave Stokely that if short term rent analysis supports it , you can refi out the cash and do STR.