i do some work with a restoration company,and take leo's advice get a proffesional's opinion,mould is so toxic people dont relise how serious it is to your health, it needs to be cleaned by proffesionals. walls treated and primed before it can be repainted its not going to be fixed with sugar soap....houses that are lying empty for a couple of years are full of hidden problems,spend some money finding out as much as possible about the house i.e get a plumber to check the heating and get an engineers report on the house,cover all avenues now,and trust your gut,would you be asking all these questions if you were happy deep down that this was a good idea..