Cheap alternative to DLP projectors?

From what I see, the only thing keeping SLA 3D printers from being just as cheap, if not cheaper than FDM 3D printers is the fact that a projector will cost at least $300. Does anyone know or think there will be a solution to make the light projection factor in an SLA printer more affordable anytime soon? I know there are laser SLA printers as well. How expensive are lasers usually

I would think that someone would be able to come up with some sort of open source light projection system that doesn't need to cost as much as a DLP projector. the projectors being used on 3D printers are not made for 3D printers. They are made for other things. This means that we shoudl be able to create a 3D printer only projector for a fraction of the cost.... At least that's what I would think.

Hi Luv2Fight,
If you make a projector dedicated to 3D printing, the quantities will be very small comparing to mass market projectors... So, without cost reduction due to scaling and proper industrialization, will it really be cheaper ?
The quality and durability of a dedicated product may be significantly better though.

I would imagine that the projectors out there today have many features not needed for 3D printers. couldn't we cut some of these out and make a cheaper product?