Yes, [sounds breathy, almost approaching a laugh.] Either way, the occupant would need impressive upper body strength to move such large treads. A motorized device would be better. If fuel is a concern, you could even attempt a wind-up mechanism... though the spring tension would be incredibly high, and rough terrain would challenge its run time.

[Belatedly, amid the whirring of his thoughts: a ping.]

Have you... never built a machine of your own?