Makes me want to get some tracks for winter fun!!
The roll cage is well thought out - looks removable plus has storage for the 4 wheels when tracks are on.
Track kits are about Euro 5,500! Would need to get Haflinger specific driving hubs to bolt on to the original Haflinger hubs, as these are originally made for ATV and side by sides.
They apparently work on all surfaces, so could be used in mud, rocks, snow etc.