Flygen

For about 20 m² and a use during about one month. Consider scaling-laws for a soft kite that are explained on Is the modern Power Kite the answer to Kite Power? - #28 by PierreB :

13.5 tons for 900 m². Starting with the 1 kg paraglider would perhaps lead to a lower mass, but not so lower than that of a rigid wing for the same power.