I have two bicycles with Shimano 3N72 36 hole front hubs. I built the wheels myself and probably have less than $150 in each wheel. The hubs themselves were a little less than $100, then its rims, spokes, etc. One rim is Velocity Dyad and the other is a Sun CR18. I cut the costs a little by using straight gauge spokes. For front lights one is a B&M Cyo and the other is an AXA Luxx 70 plus with built in USB charger. Each cost in the neighborhood of $70 to $80. Wired tail lights on both bikes are B&M Toplight line maybe $40 to $50 each. The first bike setup is going on 5 to 6 years which I commute on daily. The dynamo hub gets most work out in the dark winter months. I have probably rewired everything on the commuter bike once, cleaned/sanded the terminal connections on the hubs. Other than this basic maintenance, everything runs perfectly with no noticeable drag, etc.