That looks very smart and the tanks look like they were custom made to fit! The shelves look quite substantial so hopefully they can support the weight.
I am probably the last person to be talking about the cycle, but shouldn't you have something in the tank to start it cycling, ie plants, maybe some snails, or something??? I could be wrong of coarse???
Hopefully someone else with experience of cycling can advise on this? Its as much a legend to me as 'the flying dutchman'!
Looks fantastic setup though!
Shrimps will do well with just a sponge filter operated with a air pump, that's the very least you should have in the tank if you intend to keep the shrimps, if you don't intend to keep the shrimps, just feed them to your betta.