Scaffolding and repointing

I'd be grateful for some advice on costs of scaffolding and repointing, I am in the process of buying a flat and it has come up as potential future works. I don't have much in the way of detailed information as I don't yet own the flat.

I am trying to find out how much it might cost to repoint a 12 flat, two storey (ground, first, second floor) 1970 purpose built block of flats. I expect scaffolding is needed with at least two levels. The building is wider than it is high. That's pretty much all the info I have. Flat is in Croydon, Surrey.

I can't do a link as I'm a first time poster and the site bots stop that but here is a broken link that might work, has a picture of the front of the property on right move

. Rightmove .co.uk/property-for-sale/ property-60466157

I have asked seller for details but she says it's only planned for summer 2017 and estimated will be got in the new year. So I either withdraw my offer - and God I don't want to do that as this is flat number three that has fallen through and I'm £4k out of pocket and I think I may have to give up being a home owner as I can't do this again :(:(:( - or take a punt and see what happens. But Potentially this leaves me exposed to thousands of pounds, and I don't have that so could be unable to pay and lose the flat when I become in debt to the freeholder management company. I know scaffolding is not cheap and repointing is time consuming and a bit dull so it could be expensive.

Any thoughts? Help? At least a scaffolding estimate? How long would it need to be up for and what it might cost in rental?

I know the information I can give is not enough but I don't know what else to do so would appreciate any advice, if not, I guess I live in rented accommodation for ever as I can't do this a fourth time. .

Thank you