RE: Electric suggestions
I think he meant the batteries are 6S5000, not 500...?
If the setup is 12S it could fly on only 30A load, but there are two problems: you have to find a motor which take 12S. And you have to find an ESC which take 12S. They are there, but in the upper price-class.
If ran as 6S there is an other problem: it have to handle 60A at least.
Just an example: AXI 4130/16 on 18,5x12 propell could get that bird airborne with 6S. Any good ESC in the 70-90A range. And an UBEC. Flight time: appr. 7-10 minutes.