The layout of the tanks on the shelf look fine, but I don’t see any heaters or filters nor do I know the stocks of these tanks, so I don’t know if it’s a good “setup” without knowing what’s actually in the setup, if that makes sense.
Yeah, ok, that’s not a good setup at all then. Having only one filter and moving it around will likely cause problems as stated above and I can’t see it doing much good besides constantly changing the parameters the fish are in. You’d also need to be doing daily waterchanges on these tanks to make sure the parameters are at least ok.
No heaters is also bad considering you have tropical fish with different temp needs at that. The betta needs 78-82F and the guppies need around 75F.
There also barely any coverage for the fish and what you do have are fake plants that look pretty sharp(at least for the betta) which could easily cause injury to the fins of the betta.