No problem, I can totally understand why you might think that, but making things for clients is totally different from making them for yourself.
First off you have to go and meet the clients:
1 hour getting ready = shower + gather together or make pertinent samples + making sure you have the necessary measuring equipment and that those that require it, have working batteries + sort out the relevant portfolio and any other information required, based upon your initial conversation with the client.
3 hours to see the job, which would include travel there, time with the client, and travel back. I'm never late, so I always allow an extra half an hour+ for travel time, trying to find the house time, and parking time, I've had some city appointments whereby I've had to park twenty minutes walk away.
Clients usually want drawings, or at least mine do. It also protects me from difficult clients - if I have made it clear what I'm supplying, I'm covered. In this case, the drawings wouldn't amount to much, but I would show them situated in the agreed place so they can see exactly what the job would look like.
Again for this job perhaps not, but quite often there is some discussion and some changes made that require a re-draw - so this has to be factored in.
Once the job has been established, I would need anything from a couple of hours to a couple of weeks to determine a materials and cutting list.
I would then spend some time ringing around the three wood yards I regularly use, to see who has the timber sizes required and at what price.
For a small job like this one, I would have to go and pick it up - at timber yards that can be a very slow process - at least two hours from the time I left to the time I returned, I would expect, but possibly more.
Unloading and storing the timber would probably take another half an hour.
Working out what ironmongery is required and ordering it will be more time.
I haven't added it up, but that's probably more than eight hours of work without even starting the job.
I couldn't turn up at one of my client's homes with a job anything less than perfect, so I would spend whatever time necessary to achieve this.
Spraying is often thought of as quick, but it is anything but. Each coat (except the last) has to be cut back - this is really time-consuming. Each face will require 4 coats (two base + two top), with one-hour drying in between. Each side should be masked to stop any overspray from accumulating on the underside - again, this is fiddly and time-consuming and adds to the cost in both materials and time.
So to spray something you need to allow at least eight hours - you can spray quite a lot in eight hours, but if it's only a few things it can't be shortened.
I use Morrells PU lacquer - it costs around £100 per 5 litres when you include the catalyst and thinners. It doesn't usually take long to order this, but it can if a colour match is required, which more than not, it is.
There is also the cost of compliance - air filters, masks that cost over £200 a pop, and waste control and removal - all very expensive.
The furniture needs to dry overnight before it's wrapped - if it is damaged in transit it will cost you hundreds of pounds to repair plus you have a disappointed customer and is unprofessional, so wrapping is of utmost importance, something most home woodworkers haven't even thought about, or considered, or experienced. On a large job it can easily take us two days to wrap and load.
Fitting even the simplest job requires a lot of organisation, sorting out dust sheets, emptying and loading your vacuum cleaner, sorting out dusters and cleaning products, plus the extensive list of tools and equipment required to do the simplest job is ridiculous, as you have to over compensate for the unexpected. At home you don't have to think about this, you just go and get what you need.
When you leave the customer's house, you're still not done. You have to drive back, unload, put everything away, sort out any rubbish, check your stock levels on what you've used (glues, masking tape, screws etc.) and re-order things as necessary. This all takes time.
So yes, to do that job I would definitely allow a week, and can quite easily justify the cost - on a small job like that I would however ask the client if they have any other small pieces they require - they always do, especially as it won't add much if anything to the overall cost.
I've probably just covered the tip of the iceberg, you'll either get it or not