Hi, I think you will find that due to no work starting after the first special levy you have essentially gone no where so are free to ditch the last bloke, who has done nothing by the sounds of it so should have no claim, and restart with a new bloke at a new price, if not spec of works required. You might need to vote on the new blokes works and cost to get it all official. The incoming new owner won’t be up for the money the former owner already contributed, but will be required to stump up for anything further – which was collected for the roof now, but they will be for whatever comes next whenever that may be. The incoming owner’s conveyancing solicitor should have picked up on anything of note but if it is as you have explained it the new buyer was made aware of thus or was felt not needed to be, and on we all go.