So, we've seen a (potentially) lovely house but it needs a lot (conservative estimate £100k, realistically more like £150k) spending on it to get it up to scratch.
Done up it would be worth say £850k (others in the area go for a bit more but have bigger gardens and / or are detached / larger).
So if spending £150k would get you a house worth £850k, but would be a lot of work and upheaval, how much would you be prepared to pay for the house?
We don't want to make money on it, as in sell it on, but it feels wrong to take on all the work and deal with all the disruption if we could buy the finished article for the same (or maybe even lower) total spend.