Insanity to try 15 yard placement by myself!?

I'm in the preliminary stages of planning a solar panel ground mount foundation. The concrete is needed to add counterweight mass and provide a place for the solar array to mount to. In theory the concrete pad would be 6 inches thick x 6 feet wide by... 135 feet long!

Would this be insane to not only place as a DIY'er but also to place alone (with the hopeful help of the truck driver?). The pad would be fully prepped with road base gravel and compacted. I would make the forms with a flat top so that a vibrating screed could be pulled across. The finish is essentially unimportant, so I imagine I would bull float it and potentially put a broom finish on it to learn how to do it.. but that's it. No finish troweling.

What I'm worried about is getting a driver that isn't willing to help or wouldn't be able to pull up along side the form and tailgate it. It's an open field, but depending on weather the ground could be soft. I could load the concrete into a tractor bucket and drive it over if I needed to. I definitely don't want to use wheel barrows.

Edit: I never said the truck driver was going to help me screed or finish the concrete for me. Only help in the sense of emptying the drum into the form. I've seen drivers that are willing to do this and some that expect you to do everything including meter the concrete down the chute.

Would it make more sense to hire a pumper so that I would at least have that covered? Or just bite the bullet and hire a crew to do it?

Out here concrete is $220+ per yard and I think lots of places are gonna want $5k+ for the labor on top of the ~$3,500 in concrete. Any money I can save would be a benefit. I'm a sucker for trying to DIY things. $4 psf is a lot more manageable than $8 psf. (Or the $16 psf I paid the last crew to do turn key).

Final Edit: It sounds like this isn't a skill issue or a lack of skill problem but a: 'You're gonna be fucking tired and it would be nice to have a few extra people to do heavy lifting when you get tired' thing. And no one can seem to agree at what the driver is going to do or not to help. It seems I can't even expect them to put the concrete into the form 2 feet from their truck, while other say this is completely normal.