Hi Visual,
Firstly welcome
I too am older than tha avarage wanabee. If you read through the mass of info on here you'll get an idea that its hard but not impossible. However like all things in life, try to do as much research as possible and go into it with your eyes fully open.
At 47 you've still got 18 years of working life in you! That's if you want to work till 65 that it. I think 18 years is a reasonable amount of time, don't you. I have a friend who got command with Ryanair after only 5 years.
It will depend on how hard you work at it and the connections you make along the way. If you are willing to go far and wide to get that first job then I personally don't see why not.
All the best.