Ho-lee chit!!
The only drawback I can see to the 1/16 and 1/6 tanks is that the kits all seem to be made for R/C, which makes them cost more. I would like a 1/16 one that is just a static kit.
I have been thinking of 3D printing some bottle holders, but they are so simple, I could make them out of wood even cheaper. However, I am apparently too lazy to do either....