Yep, a small fortune for sure, and sometimes not so small.
Modifying a 4x4 with the correct equipment to get out and about with safety and minimising potential damage and breakage is a critical part of that hobby; get it wrong and it can go badly...which can also happen when the modifications are correct also. These days there's so many great products out there but most are costly...there's cheap variants but those often aren't worth the money one pays mostly.
It's great that you helped, that would have saved some cost, but I've always left it to the experts...it's far too complicated with modern vehicles.