Incredible wing area! 1556 squares! WOW!!
If it comes in at 17 lbs, WL is 25, okay but not great,
if it comes in at 16 lbs, WL = 23 much better, which is about where my GP Ultimate Bipe is with a DA-50 on it.
If you do the Wing Volume Loading (WVL) thing it is in 7 range fir both, which is really good.
So which engine? If you go 50cc do you end up at 17 lbs?
If you go with a MOKI 2.10 maybe you come in at 16 lbs. Not familiar with MOKI's, would a MOKI 2.1 be able to hover a 16 lber?