Buying a $20,00-$30,000 machine is a heck of a bite for someone that is just getting into the industry. There are other expenses beside just the machine, air scrubber, design software, and a computer to name a few.
If you start with a Chinese machine your engraving might be slower but it may not be important since you won't be doing long production runs, if you happen to land a huge job you can always sub out the laser time, using the art that you provide. At this point you are so new that you really don't know what you want, a year down the road you will know what jobs make you money and what machine you will "need" to do the job most efficiently.
I have no regrets with the machine that I purchased for the work I need it to do.
Scott
Rabbit Laser RL-60-1290, Rotary attachment, Corel Draw x6, Bobcad Ver 27
Juki-LU 2810-7, Juki 1900 AHS, Juki LU-1508, Juki LH-3188-7, Juki LH 1182
Sheffield 530 HC webbing cutter