Anybody growing anything upside down?

I planted 4 cherry tomato plants upside down in hanging 5 gallon buckets. The entire internet swore I was going to have to water them everyday or even twice a day. I have found the opposite to be true. The soil in the bottom of the bucket stays moist for 5-7 days at a time. I've already lost 2 to overwatering, the rain from last week and this week looks to be the nail in the coffin for the 2 remaining plants.

Any success stories out there? I did it because I have super limited space and even more limited amount of light. Hanging them gave roughly 2 more hours of sunlight per day. 2" wide hole in center bottom of bucket, around 10-12 more holes on bottom and sides of bucket.