Hello,
First of all I should say that I can do this at $600. I am an electrical engineer working the solar installations field for more than 3 years with a total experience of over 3MW. I was the design engineer and the site engineer for a 1MW project and a 1.67MW solar project. We used JINKO solar panels along with KACO inverters.
I can design and provide you with drawings to meet all your requirements. Panel laying, Panel string sizing, DC cable sizing and cabling, DCDB design, ACDB design, Inverter sizing and placement, AC cable sizing and cabling, transformer sizing and placement are some of the things that needs to be definitely designed before moving into the implementation phase. I will provide autocad drawings for all these.
My focus will be to increase the quality of installation, minimize the total cost, minimize the losses and to get the maximum generation. I can provide you the designs in a week since I'm a full time freelancer now.
If you are interested please send me a message. I need to know more details of the project. Thank you!