Yeah, props would be noisy.
Bees would be the electric engine of the family, a methode of capture (trap, domestication with honey, or a lab mind control device.) and some rope and it would be less noisy, but still very noisy.
That or we could have ion engines for real electric power consumption.
But yeah, I want an awesome floating base.
Also to be noted: the balloons of these things are incredibly hard to destroy, the balloon should maintain enough buoyancy even when 25% of the surface is destroyed to land safely.