Ok, 4 valves are best, so I would probably start by buying 4 stainless ball valves with the actuator mount on them. Just the 1" ball valves are not too expensive and you can get the layout part done. Then one by one purchase actuators. You could scout eBay for good deals when they pop up. Sounds like a fun project.
Another project I did recently is made a zwave garden watering valve with cheap stuff from Amazon. I will make a new post on that in case someone is interested.