Door Renovation – Quote Request

I’m looking for a quote to fix or replace an external door on the 2nd floor. The door leads from the balcony to the stair core. It’s clearly damaged, and while I’m not completely sure about the frame and threshold, they also seem to have some issues. The wall below the door (on the floor underneath) shows signs of damp, likely from water coming through due to the door problem. I’ve attached a few photos to help illustrate the situation: one showing the door and frame, another showing the wall below with signs of humidity, and a wider shot showing the door and the surrounding area. If possible, I’d prefer to keep the same door and just renovate it. Please let me know if you think the door can be repaired or if replacement is necessary. I’d also appreciate an idea of how much the work would cost, and whether you’re able to sort out any issues with the frame and threshold as part of the job. Thanks, Cae Poloni