It sounds like you may not have a lot of experience useing a hydroseeder or pulling a gooseneck trailer. My setup does look intimidating but is easy to manuver and use. I've had several hydroseeders and this one is the best and easiest to use I've had.
I'll make you a deal. You contact Mowingman and work out what you guys want to do, pay me for the equipment, and divide it between yourselves how you want. I will even let you use my shop to separate trailer and hydroseeder.
Sorry, I won't deliver.