I thought about welding a $100 SSQA plate onto a regular $400 electric cement mixer to make it easy to move and powering it with a generator. But also thinking I could fabricate a light cement dump bucket using a quick attach plate and some sheet metal laying around here.
Thanks for the reply and pictures Newberry. I had to go back to 5030's post and re-read - I missed that he said concrete mixer - the op was talking about a moveable pour spout and that's what I was thinking of. I do know what a 3 point mixer looks like but was glad to see yours! Thanks.