Hot water recirculating system?

I need some help choosing a hot water recirculation pump & related equipment for my home. Some of the plumbing in our house is over 100 years old & probably runs hundreds of feet through the house. (When I get up for work I turn on the shower then fix myself a cup of coffee while it heats up.) This seems to be the perfect application for a recirc system.

As luck has it the farthest hot water tap in the house (kitchen sink) is a straight shot of about 40 feet from the hot water tank along the basement ceiling, so I’ve already run insulated ½” copper tubing for a return line. Neither end is connected yet—one end is near the water heater & the other end is under the kitchen sink.

I know I’ll need an electric pump (I can tap into a 120V junction box near the water heater) and some sort of programmable timer. I’d rather have an external timer than one built into the pump.

I know I’ll also need a one-way check valve—or are those built into the pumps? Where do you put a shut-off? What kind of flow rate is needed? Do I secure the pump to a ceiling joist or just let it hang by the pipes?

Need suggestions from plumbers or experienced DIY-ers. I’m willing to spend a little more for something rugged & reliable. Online searches turn up so many products that it’s hard for me to evaluate. Thanks, Flutherites!