Ro water vs Filtered water

I use rain water I collect from my tin roof. I bought 2 65 gallon pickle barrels and converted them to rain barrels. Ph is constant and almost no ppm.

Ro filter is probably the best investment I made.

For my needs I use a stealth RO system 150gpd. 300$ and about 80$ a year for filters.
Dose all our drinking water as well.