+1
It's not bad compared to costs of other folks passions such as:
Photography - decent SLR camera + lens setup > €5k plus extras!
Golf - clubs, membership, trips, gear, green fees, etc
Car restoration, Rallying - bottomless pit
Rugby supporter including season tickets and trips abroad for away matches, same for soccer.
Sailing - don't start!
Horse racing - too many zeros
Cycling, carbon fibre hi-tech bikes, gear, gear, gear
Skiing - trips, ski passes, accommodation, skis and bindings every few years, boots
Flying fixed wing, flying heli's makes collecting every MM loco ever made look inexpensive!!!
Surfing - gear, gear, gear, trips, trips, trips
As BK said its often the simplest mini projects that take so much enjoyable time that can be so rewarding.