Ok, this will need some forethought and you may have already missed the boat. I raised the money by buying my house in an up and coming area, living there for two years and then selling it for nearly double what we paid!
It also helps if you have a wonderful wife who is happy for you to sell your home and spend all the equity on upping sticks for 18 months to follow your dream. Quite a risk but it seems to be working at the moment.
I admit I have been very lucky and this plan may take a while to work for you, as the property market seems to have peaked in the UK at the moment. Failing that do what everyone else suggests and GET A JOB!