My BIL/SIL bought a house that smelt so bad, I mean shockingly bad in an excellent location about 25 years ago.
It was the home of a reclusive man, with a large west facing garden.
They undoubtedly got it at an discount.
The filthy smell was putting many off.
They cleared the house of absolutely everything.
The carpets were so shockingly bad.
A horrendous smell of urine.
They washed all walls and all the old wooden floors with a disinfectant mix.
They replaced the kitchen and bathrooms inexpensively.
They white washed all walls.
The difference in one month was unbelievable.
My SIL undoubtedly drove the buy as she was from the area and this house, smelly as it was, was excellent value for money, and in their budget.
A couple of skips and a weekend of hard stinky work clearing the house really paid off.
Their families could see the potential very quickly too.
Washing walls and floors will get rid of any smell.
Just get rid of all soft furnishings.