outofwhack
It seems to me that every question you ask would depend on the country where this would take place, which you don't mention. I'm in the USA and am not aware of type ratings here on small ships like this, so I'm guessing you are not USA-based, to phrase the question that way. I'm not qualified to answer for another country.
As the kit was offered with a Rotax 582 powerplant, this one is even more experimental than most. This might solve a problem experienced by some with the original, minimal power and engine-seizing during flight. I thought the one two-place prototype that Revolution built, called the Voyager 500, used the same tranny, as it was up to the torque demands of the heavier ship. An EAA friend of mine has a Mini500, and I thought he talked of a mast-support mod that he last did. I've never seen him fly his, as he's become lazy and fat, well above 300 lbs. That poor little 66-horsepower Rotax simply can't pick up his larda$$.
But, I also think he's leery of it.
In the US, I would have to consider insurance. I would imagine that insurance couldn't be obtained for this operation without the ferry pilot having some sort of training or checkout for the type. (Well, pay enough money and perhaps someone would sell you insurance.)
Before you get involved with this machine, do your homework. I would suggest spending an evening reading various forums (including this one) to know the history of these helis and of those who have done aftermarket conversions and mods. Figure out where the turbine conversion came from on your friend's machine. Google Mini 500 with these names: Dennis Fetters, Richard (Rick) Stitts, Joe Rinke. There is much nastiness surrounding this type. That should keep you busy for a while.