Nekro make sure practice extremely hard for the PTC assessment. I heard they only take the best of the best. Rumour has it only 1 in 48 people pass! They are extremely picky on who they take the ~100k from.
On a serious note, I would do some really good research on this company if you are thinking of even paying for the assessment let alone the ~100K they look for. A quick google search will throw up a few interesting stories.
Best of luck in your training, whichever route you choose.