I agree with others it doesn't particularly need to be painted but that initial photo is awful I would discount it immediately on seeing that one as I would think looks like right on a busy road.
A priority in my mind is to get a new exterior photo maybe from the garden? It says in the blurb that it's a large plot but there are no photos of the garden.
The photos are generally poor IMO, odd angles, odd order, too many of bathrooms and not enough decent ones of living space/outside space.
The sitting room photo looks dark and what stands out is the blue light thing below the TV which tbh is quite off putting.
The bathrooms look nice but odd angles so hard to get a good idea of size/space.
The decking looks totally bare and uniniviting - what do you use it for? Do you have a table & chairs you could put out there? Couple of pots of plants?
Do you need 5 bedrooms or could you style the 5th as a family room (it's described as that/bedroom but I couldn't see any pics) 5 beds and just one open plan living space is a bit of an odd layout IMO, I would be looking for additional living space especially as the living space isn't very big and there's no utility room.
As the blurb mentions space for 2 extra houses there must be a decent amount of land def need pictures of that and also a plan of the plot would be helpful.
I really think the main thing putting people off viewing though is the first picture.