You are indeed right, there were a number of requirements that had to be met for the project to go ahead and only one not being possible would have scuppered the whole idea, however support from the missus is probably top of the list.
That isn't to say it's been an easy ride, months of builders on site and having the garage partially demolished and plaster dust everywhere in the house certainly didn't go unnoticed and the statement "I wish I'd never agreed to this" may have been said more than once, however you know what they say about pain and gain.
Of course the situation I'm in now is that it's pretty difficult to get me out of the house of an evening so thats breeding it's own issues, I also need to make sure I manage my time effectively so I don't get into trouble for being absent for too long