Horology is just a spare time hobby so I repair clocks when time permits and this is why it suits me when owners to bring their clocks to me and then collect them afterwards.
I also handle some by post but you must be prepared to accept all the transit risks. Damage can result that no courier will take responsibility for, such as glass breakage, and antiques and clocks are often excluded from their carriage terms. Also, a clock movement can be knocked out of beat by mishandling, no matter how well packed it is.
Increasingly, I've been asked to make house calls, attending the owner's home to perform some repair work in situ, including untangling weight lines, setting a clock in beat, anchoring a longcase clock to the wall for stability, moving a clock from one location to another and setting it up again, diagnosing an intermittent problem - generally things that cannot be done off-site. I cannot overhaul clocks on site because my lathes, pillar drill, bushing machine etc are all far too heavy and cumbersome to transport, and you wouldn't want oil, chemicals and ammonia on your best carpet, would you.
I try to accommodate all requests but remember this is just a hobby not a business so whilst I can often visit during weekdays because of the flexibility of my day job, it is not always possible and you might have to wait a week or so. Like you, I do have a family life!
Where I have the time, I am always happy to help and for a visit taking up to half a day (including travel within Essex), I charge £100. A visit that takes more than half a day costs £190 per day or part thereof. I might ask for a contribution to fuel costs if you're more than ten miles from Billericay but for this kind of work, I would not expect there to be any additional costs as it's more to do with providing expertise and experience than expensive spare parts. If there are likely to be any extra costs, however, I will tell you when you first call me to explain what is required.