Great piece of custom work. Now all you have to do is tell us how you made it.
If we start down from and up
Dobbelt bogie from panorama express set 4124
2 X Flat bed car set 4104
turn parts off Mobil crane 3527 (base + chassis of crane)
Trailer body and roof from construction trailer 7242
Excavator boom + winch from cable excavator 70442 (boom made shorter)
Crane unit, pulley support and hook from 4210 MAN crane
locomotive boiler and cab 4051
Water tank 7891
carousel base from 3416
Lower part of crane 5253 Cargo Ship
+ some 3D printed parts = 4 X Brake lever + crane arm supports
It is shown that well also a little bolts and screws