Generally the idea sucks but if you can make good contacts you could literally make a fortune. My brother used to work for a design comapny and you'd be gobsmacked at the prices they would pay for single custom made pieces.
For example around 30k for a desk at one of the police chiefs offices and that just for the design which I saw the CAD drawings wasn't that great at all. Also some stuff for the rulers office shooting gallery, yes the office also had a shooting range built into it, go figure.
But your work has to be top notch plus top notch presentation etc etc, i.e catering to mostly the rich and VIPs to really the money.
For the average joe, times are tough most people packing and leaving and dumping whole villa full of furniture at cheap prices plus no one really wants to spend on "custom pieces" nowadays with the economic downturn and all, specially when there is a huge variety of ready made ready to install stores here, like
Ikea etc etc.
Also not to forget there is already industry doing this specially in places like sharjah where you can anything bulit to your liking.
So unless your willing to spend major money is setting up a top shelf bussiness i.e snazzy office/showroom and workshop its not going to make enough money for you to survive on. Maybe an odd order here and there but not enough to make a decent living on.
In the gulf you cannot compete with the cheap south asian labour in tradesman fields likes welders, masons, bricklayers, carpenters, painters, garderners etc etc.