5 gallon buckets last forever... and if you like to roll here's how...lol... old school...
Harp, you might want to consider buying an old used washing machine for your smart pots.. seen some at garage sales for 50 bucks that work..you just need to hose most of the soil off first..wouldn't recommend it for inside the house but if you have an overhang or awning outside it might save you some work..
not a big issue for the indoor grower but for outdoors why don't they have white pots..
it helps reflect the sun so that the roots don't get as hot.. black hides your pots getting dirty but you can wash most of it off..use to paint my plastic pots light green and then spray paint splotches of light brown on em so that it'd blend in with the landscape..kind of stupid really because from the air pot plants are so easy to spot but it did help a bit keeping the roots cooler..with smart pots black really isn't an issue since it can breath..
I've had lots of trouble keeping my smart pots from drying out too quickly. They do a great job in making the roots ball huge but dry out way too fast in my rooms.
The drying out issue is what makes them better for my rooms, as it forces me to water more.
I wish i had time to water every 18 hours.