I need advise, serious one and not those joking ones...
Anyway, I got this proposal from someone to start a business.
The requirement is that I would need to get into this line of
business for working experience for at least one year to acquire
the license to start this business.
My concern is that my past working experiences is mostly part
time and the only full time experience is in sales line for half a
year. I'm turning 29 this year and it would rather hard on getting
employment if I waste another year.
Given that money is not a problem, what would you do if you
currently hold a diploma cert?
Would you risk your working life for a chance for being a
boss?
It could be a mess if after one year, they lose the interest and
not start the business also although I do not think it would be the
case as I know that they are reliable.... What if I failed them
after starting the business.
And my family and relative wanted me to get into stable job in
gahmen sector though I had not told them about the proposal...
Sounds a bit like mid life crisis... 
If you are having a stable and prospective job at the
moment, I would not encourage you to give this opportunity a
try.
But since you don't really have a stable and prospective
job at the moment, I say there is no harm in spending one year to
gamble on this opportunity that has presented itself to you.
You can always try government sector if your gamble on this
opportunity does not bring you to a more prospective career than
what you are having at the moment.
And if you really want to go for it, DO YOUR BEST FOR IT and
don't even think about failing it.
Just imagine and convince yourself that if you do fail in doing
your best for it, you will lose the most important thing in your
life.
Maybe that should motivate you to do your best and less wimpy
attitude is always more preferable to me. 