I wouldn't do it all over again. If I had the money, i'd SFH whenever I wanted to and leave the costs to someone else, ie insurance, hangarage, servicing, maintenance, purchase costs, etc etc.
As for earning a living doing it? It'll take a few years yet before i'd actually be 'earning' a living. £110k is a lot to pay off. Just make sure you do it all for the right reasons.