In many respects the purchase price or yearly rental of the flats is not that important - With a building like that the yearly service charge will be the deciding factor for many future inhabitants. Sadly most of these old structures do not fit easily into the ideal 21st C living standards and construction methods leave much to be desired, so maintaining the building will be expensive! In the mid 60's properties like this could be had very cheaply - most had stood empty and abandoned since being released back into private ownership by the Government/MOD after being used as wartime troop accommodation. My mate and I looked at many of the smaller country houses available in Yorkshire, with a view to conversion into two apartments for our respective families. Purchase was no problem, the cost of proper conversion and on going maintenance costs killed the idea immediately. Eventually we found a stable block and yard that had belonged to a country house burnt down in 1916 and to which our DIY building skills were enough to convert into two dwellings. But then again things were much different back then; yes money was much tighter for conversion projects, but there were none of your stupidly officious Planning Officers breathing down one's neck all the time!