@Juan Alvarez congratulations on starting the real estate journey! When selling properties occupied it's a challenging task because your buyer pool is so limited to just investors. If you're wanting to flip and are on a time clock bc of hard money I would recommend leaving the property vacant because it opens you up not only to investors but owners occupants as well.
One thing I was unaware of on these DSCR refinances is the pre-payment penalties. My top 3 go to lenders all have 5,4,3,2,1 pre payment penalties, you can pay some points up from to get that to a 3,2,1 but there's still a penalty for paying off early. So if you have deep enough pockets I'd hold the property for longer and refi into a conventional loan if possible. I'm trying to turn my money quickly so I can get more units because I plan on holding these properties as rentals so I don't mind the pre payment penatly I'll just have to wait to refinance those if/when rates come down far enough for it to make sense.
Hope this helps, best of luck!