From what I can gather from this side of the pond, the Free Winds are hand built built by Friso Heidinga, the owner of Amsterdam winds. Basically what started as a repair shop, he's now building his own horns.
Much like Tommy Inderbinen located near Zurich in Switzerland, initially a repair shop has for many years now hand-built his own brand horns and flutes. Keywork is (I believe) from Yamaha. I would expect prices to be similar from both these hornmakers.
I had Tommy Inderbinen make me a neck for my JK SX90 some 15 years ago now. Recommended by Albie Donnelly. Beautiful piece of kit, really opens up the sound on an already big sounding horn. I know a few people who own Inderbinen tenors although I've never personally played or even seen one. They tend to drool when talking about them. Maybe coincidence most of 'em played MKVI before making the switch. I do know there's a very long waiting list for an Inderbinen horn. I waited a good 4 months for my neck.
Candy Dulfer has been playing Inderbinens for a good few years now and I suspect she knows the guy from Amsterdam Winds which is probably why she is now doing promo for him.
There you go - Mortgage yer house get one or two.