Recirc or storage tank?

This pertains to my personal home, being built in the spring. All heat is to be hydronic and I'm planning to employ a reverse indirect for both buffer and domestic usage as there are a few micro zones as well as wood, gas, and electric boilers. This is a slab-on grade home and the mechanical room is 50 feet away from the master. The master shower (and occasional bath) will be the highest DHW load in the house while the master sink or adjacent guest bathroom seldom uses any hot water. Laundry is also on that end with a similar distance but water temp is of lesser importance for those first 30 seconds. I'm toying with the idea of a small electric point-of-use tank for both sinks (cold inlet fed from the hot line, if usage goes past the tank capacity), and putting a recirc pump on the 3/4" line feeding the showers/tubs with a push-button timed switch to bring it on only before bathing for 1 minute to avoid wasteful recirculation. Does it pay to go to a larger storage tank with a recirc on a temp sensor, or even a second indirect since I'm running large diameter hydronic piping over there anyway (4 zones on this end so one main w/ zone valves makes more sense to me than home runs back to ZV in the mechanical room for each one)? I don't generally play with domestic plumbing so I'm not sure what the proper channel might be for something like this. Our current setup uses the switch/recirc approach for the master shower and it works pretty well but it's only half as far and uses a 1/2" PEX home run system which I would like to avoid in the new house as I prefer a copper main with branches to each fixture. Insight would be appreciated, thank you!