Try a more modular DWC style like the waterfarms, which is a single 3 gallon pail unit- and you can fab up a DIY one that mimics it closely for cheap. Or a few of them. Look in grow logs...

I had a FIVE gallon res overflow (tube fitting came loose and leaked) and now have to completely re-plaster my living room ceiling... lol! Well, I'll be laughing after the job is done. I hate overhead work