Hi ,
150 watt laser for cutting metals is very low power . Laser is the best but at least you need 500 watt.
A 500 watt laser price maybe is over $20000.
You can have a plasma for around 6 to 8 thousands and it can cut 1 mm steel easily. but it will not be as clean as laser .
you need some grinding after cut.
Where are you located ?
If you want I can convert your cnc router to plasma or help you to make a new cnc plasma machine.
If you are interest ,contact me.