I will break it down for you cost wise using my city as example.
Cost of water in my city- 1500 gallon $7.05
This breaks down to $0.0047 per gallon.
I will name an outrageous amount of waste water as I can't find any specs on it.
for every 5 gallons 2 is wasted
Amount of gallons- 7
Total to Produce- $0.0329
Using store RO
I will put the store at one mile away.
My car gets 18mpg in the city.
Gas is $3.229 per gallon
The cost to travel one mile for me would be-
Cost per gallon - 3.229
Mileage - 18.000
Cost - .1793888888888888888888889
I would travel to miles so it would cost me $.358777777777778 in gas
Gas bill - $ .35877777777778
Price of water - $1.25
Total cost - $1.60877777777778
Store Price: 1.608777777777778
Loss: 1.575877777777778 per trip for only 5 gallons
This is considering you the RO
system has already paid for itself if not
The abundant flow 3 stage portable system is 99.00 with a flat rate shipping cost of 10.00
Portable 3-Stage RO/DI System
Cost of RO
Loss at store - 1.57
System pays for itself in - 70 five gallon water changes
If you change bi weekly only five gallons the system pays for itself in 1 year 4 months and a day.
I would strongly suggest the RO