I know the feeling of uncertainty from when the business I worked for was sold, and then with all of the recent downsizing we have been going through. So in that regard I know how you feel mate. So as some encouragement may I offer up some "options" and some "advice".
1, don't get into the building industry at the moment, its more unpredictable that women at the moment (now ducking for cover)

2, perhaps you could call yourself Duce Bigallow and make a change, just don't make them pay by the inch you'll never make any money

3, rob banks, that ALLAYS seems to end well....
4, Sick with your job and see how it works out. Sometimes the change might very well be for the better. If not, no harm done (unless the redundancy package was redonkulous)
5, Send the ol ball and chain out to work and be a stay at home dad, and find a way to mount 2 car seats to the bike!
Clearly I am no good at advice, but usually for those who are willing and able, things usually work out for the best. After all the goings on with my work, I am in a better position that I was even 12 months ago. At the end of the day as long as I am upright I reckon I am in front!
Good luck mate!