Hi Bonus,
I can't speak for the NETT course as I haven't done it, but............
I don't believe that you will learn enough in the space of 8 days to pursue a full time career in tiling. However, I did a 4 week course and embarked on a successful full time tiling career only to discover that I knew about 30% of what I needed to know.
It is possible to launch a business after a fastrack training course but be under no illusion that it is not a walk in the park.
Have you done any tiling before? Are you sure that you want to do it for people other than friends and family?
And don't forget that even if you are tiling part-time you will still need public liability insurance; don't take chances as it will come back and bite you.
Good luck in your decision making.
I made the decision to switch career to become a tiler and have absolutely no regrets.

