I bought a Bachmann Big Hauler set many years ago for under $50 new. battery powered 4-6-0 with radio control chuff chuff sound effects with a tender, a gon, a flat and a bobber caboose. And terrible all plastic track. It was fun for around the tree a couple of years. Picked up some New Bright cheap plastic track for their G scale battery powered trains.
I don't think Bachmann makes a battery powered train in G scale now, but the one I had was really low buck large scale fun for awhile, but it was just too big in the house and not durable enough for outside play so I got rid of it. Helped fund my On30 adventure.