I live in a house very much like this one (and not very far from it)...
Although "completely modernised" it still costs me a fortune to heat it and there is no real way of keeping the drafts and slip colds out of the building whatever you do.
It's FUN to live in a house like this (high ceilings, large rooms, original features) but don't be seduced by the boho... It's COLD in the winter unless you sit by the fire (which costs you for wood and coal). It's COLD in the loo (because there is no radiator in there and it's a long way from the fire). It's COLD when you go upstairs to bed and for the first ten minutes IN your bed (whoever you choose to take with you).
The sash windows need painting and maintenance every year (or they fail) and the non-supporting walls are made of plaster and lathe ( so you can't bang a nail in, drill a hole or hang a picture (hence the picture rails) while the supporting walls are built with engineering bricks which CANNOT be drilled (so you can't hang a picture there either).
There isn't a straight line in the whole building. No two doors are the same and when a door knob fails it costs me antique money to replace it.
I LOVE my house (and every guest is impressed) but it ain't cheap...