Novice needing advise on projecting logo

Hello,

I'm a complete beginner with this. I've spent quite a bit of time researching things but always find it better to ask the pros, so I hope you can help me out. I live in the mountains, and i would like to be able to project my brands logo up onto the face of one of the nearby mountains. I have seen this done before with green laser, so I know I'm not delusional! The longer the distance the better, but I suppose it would be 1km minimum. I was wondering where I start, the rough costs involved, can i diy it and is blue a possible colour?

Thanks in advance.