Save up some more!!
USD 500,- will not get you starting. You will need more than just the projector. A good software with matching DAC will set you back USD 250-450,-. ILDA cable and stop switch etc will set you back another USD 50,-. Laserbeams does not work unless you have some fog, so a good fogger is also something you need. I seem to recall that you also need a personal variance as an operator in the US, and that comes with a cost as well.
It is always tempting to start with the projector it self and go from there.
If your plan is to use the laser(s) at events and make some money, get the right stuff the first time, even if it means saving up more money. Also , beams are cheaper than graphics when it comes to the projector, as shooting beams does not require the same perfomance when it comes to Galvo-speed and beam-divergence. What is your plan when it comes to usage. Indoor or Outdoor?
Goldenstar have really good projectors, but they come without a US variance if bought from China. I seem to remember that one member are selling GS PJ`s with a variance, but i don`t remember his name. There might be someone in here knowing and chime in.
Save up 2K and you can get started with a good setup.
/Datsurb
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More projects than time available.
More projects started than finished.
More money spent than earned.
More failure than success.
Just got to love lasers!