I wouldn't go with the china engines for any attempts of lift off, but would look into possibly two morini engines, only because they are more reliable and put out more horse power.
The lighter a guy is, the smaller the plane can be, I'd think.
I once knew a guy who had installed two very small motors on a hang glider with just enough fuel to get him in the air and off he went. How much does a hang glider weigh with two motors? He did it and he weighed around 180 and wore winter clothing for the ride.
Seems plausible that any of us with a little will to do and thrill to seek could pull it off too!