The lad himself is not asking too much by wanting a decent dog but... I think he is asking too much of one dog to be any good at three very different disciplines.
Sure you can get good lamping and ferreting dogs and good lamping and daytime dogs but a good lamping, ferreting and daytime dog??? one step too far old bean.
Im sure they exist but i think what you'll end up with is either
a dog that ferrets well but gets laughed at by hares or a dog that bowls them over but gets bored and wonders off when its supposed to be watching nets.
Its just my opinion
What you can have is a dog that