I work for a company that builds things to go into survey aircraft. Almost all of these aircraft are twin engined. If you are cuising around at low speed and low altitude, you don't want a failure of your single engine.
Check out the Vulcanair, which is twin engined, and can come with a glazed nose.
That's a pretty looking machine - though there is a saying that "the purpose of the second engine on a twin is to carry you to the eventual crash site" - asymmetric handling being a bit of a challenge when you're loitering among the weeds and somewhere near the bottom of the drag curve.
Years ago I built camera housings and very trick mounting plates for surveillance and recon aircraft. All of the aircraft were single engine civilian models for the reason that "pretty much anyone" could fly them if necessary.
The Optica is a fine looking machine, would love to see one up close.
