My pro sport wasnt quite as ‘in the barn’ as I suspect youes may be, but I mostly d id as you described. Previous owner used it maybe once or twice a year for the last 5 years. First order was new tires on trailer, (could see radial on the old ones), then new bearings, replaced lights and wiring on trailer. Boat I removed the 12 year old fish finder, new blige pump with automatic float, new livewell pump, cleaned up the wiring mess under the console, terrovs on a quick release up front, 60 amp breaker, 2 bank charger for trolling batteries, new trolling batteries, 788 up front, 1199 at the console, second base at the console for the 788 (to run full screen side scan/sonar on big unit and map on small one), networked the units together, hull cleaner and a wash and wax and a good carpet cleaning. On the motor I left to someone who knew more than I, maj8r items were 2 rebuilt fuel pumps, new water pump and impellor, change of all fluids.
If I have a space to work on it this winter I may recarpet it. Also want to add a true recirculating livewell system.