Ok this is a good estimate for a weekly cost, I use about 550 litres per day.
My actual water itself costs me £3.10 per cubic metre, and I use about 2,750 litres per week and you will put approx 50% to waste, so the water itself will be around:
(£3.10 x 2) x 2.750 = £17.05
That £3.10 includes the sewerage charge (which is calculated based on usage so you can't avoid it), but does not include standing charges as you have to pay them anyway.
Then I change my prefilters once every 2 months, they cost approx £4.60 for a 10" carbon and about £2 for a 5 micron filter. So, £3.30 per month is about £77p per week.
Resin, well a 25LTR bag of resin lasts me about 7 months and costs about £100 as my 4040 RO gets the water down to about 9ppm. Thats about £3.30 per week.
Then there's the RO membranes themselves, mine last about 5 years and cost £316. So that's £1.21 per week.
So your rough weekly estimate:
Water : £17.05
Prefilters : £0.77
Resin : £3.30
RO Membrane : £1.21
TOTAL WEEKLY COST: £22.33
Or 0.8 p per litre.
As for time spent, switching the water on at the end of the day takes about 20 seconds.
Changing the filters takes about 20 mins every other month
Changing the membrane takes about 40 minutes every 5 years.
Changing the resin about 30 mins every 7 months.
So, total time taken equates to about 15 mins per month.
My advice would never ever be reliant on someone else for something as essential as pure water. Plus it will always always be cheaper to produce yourself.
And what’s this “an hour making it” lol! It takes seconds to switch on.