Just some thoughts...

4-6 5gallon buckets...

That's somewhere around 20 to 30 gallons of water (yes, I know... I rock on math).
Plus the odd 2-3 gallons you absolutely HAVE to spill all over your house in order to keep the universe and its Entropy laws happy.

20 gallons... every 10-14 days.
Get a water filter... unless you have good tap water (blessed!).

In addition, think about changing the water... you might want to raise the buckets a little bit, and install some plumbing... so you don't have to physically remove the entire bucket for every rez change.

Just two or three ideas... keep at it buddy!