Not sure what you mean by 'estimating man hours'. If you mean do we have something where you say (for example) the yard is 2000 square feet and that equates to 40 minutes - no we don't. There are too many factors for that to be effective. However, you essentially estimate man hours when you schedule jobs in the calendar. Timesheets are also a way of tracking this as you go.
You can add driving time as an expense for the job and can add both of these to any quotes you give (which are turned into jobs and invoices). This will be addressed better when we release the routing feature (can't make any time promises but it is certainly at the top of the list).