Cosine hatching is suitable for hyper-realistic portraits

I intend to give hyper-realistic touch to my customers for the free hand drawn portraits of them.

But is hyper-realistic effects possible with cosine hatching ?

My claim. A big yes.

I hope to start a business. A free hand drawn portrait. A hyper-realistic portrait. A fees of 10000 rupees. And a monthly target of 5 portraits. 

And that's gonna be my retired life !!