I would try to get as many houses in the same area as possible, like 5 in the same neighborhood would be wonderful, much less drive time.
I wouldn't put $35 for every home though, maybe starting at $25 for most homes or something. Or maybe put an hourly rate for labor on there.
If then God so clothe the grass, wich is today in the field, and tomorrow is cast into the oven; how much more [will he clothe] you, O ye of little faith? (Luke 12:28)
For if we live, we live to the Lord, and if we die, we die to the Lord. So then, whether we live or whether we die, we are the Lord's. (Romans 14:8)