A night out can cost around £50, so (IMHO) taking a chance on a something that could potentially save a lot of time, money and effort in the long run is worth risking £100 even if it ends up being a waste of money.

However, in regard to the NEJE laser cutter, I read that the laser head life is "about 3 months to 1 year, but it's also closely related to how you use it. Main factors include: temperature, time intensity, current, voltage, anti static treatment, etc."

So my first questions would be: How expensive is a new laser head and are spares easily available?

Maintenance & spares are two important factors you cannot afford to overlook if you are going to buy equipment that you hope will save cost and effort.

Have you considered using bespoke laser cutting services instead? Someone like this? http://www.bespokelaseruk.co.uk/