In my trailer park (these lots are small) our base price for mowing is $10.00. When more things get added to the equation (i.e. hedge trimming, edging, etc.) the base price jumps to $15.00. Since these lots are small we don't go by hours unless we're doing something major. I usually determine the price going by how much work was done.
Example:
If I went to a typical lot and trimmed 3 bushes that were about 6 ft. tall, along with mowing and weed whacking I would probably charge at least $30.00. If memory serves me right, all that would take about an hour.
I haul all yard waste away.
The typical lot takes about 10 min to push mow, 5 min to weed whack.