how to tap into the equity in my short term rental

[Tyrel Holman]

So i have alot of equity built up in my cabin, i paid 292 for it at a 2.8 interest rate back in 2020. Now it appraised for 600. So my question how do i tap into that equity without loosing my interest rate? I've thought about a heloc but not sure if someone would do it on a short term rental. So does anybody have any thoughts or suggestions on this