On Polish website it stated that max engine for this inflatable (they call it SIB on this forum) is 35 kW.
On this in English (mentioned by you) Inflatable Motor Keel Boat KM-450 D - Kolibri Inflatable Rowing and Motor Boats
it is 35 HP
This boat weight is more than 100 kg.
Even if you go alone not sure if 10 HP be enough to go to the plane.
Which is usually most effective way ...
The best idea is to check it.
But if you think to have some passengers I will invest in 30 HP outboard.
Or 9.9 HP not require licence or vignette in Croatia ?