In it’s current state it looks like a full Reno. A full Reno of a property like that is nearing 60/70k, by the time you rewire, replumb, roof, skim plaster, new bathroom, new kitchen etc. Nightmare!
I think you need to take it off and botch it to make it not look that way. Paint everything white including the exterior and board. Redo the bathroom cheaply but neatly and simply for around 5k. Paint doors and windows in either white or black. Get nice cheap £10 ceiling to floor sheer voiles from dunelm, new carpet return off roll or Lino in a neutral wood colour.
Goodluck