"As an aside I recommend doing the 150 Nautical mile QXC as the 100 needed for the NPPL is neither use nor ornament for any thing else...."
You don't need to do a QXC if you have a GPL....you do need to do a NST.
10 hours is the minimum of which 1 has to be sole. But as pointed out above you will probably need more, I took 13 as i added the SSEP on the end. Doing all the flying in a SLMG as its cheaper, just added the type ratting at the end.