When I first started with my vegetable patch I'd spend hours watering by hand. That got old pretty fast, so I started setting up micro sprays and drippers to water the beds or individual plants. However as soon as I replanted or cycled my garden beds none of the sprays and drippers were in the right places. So then I'd spend hours and remaking the watering system for the next season, throwing out sections of pipe and fittings I didn't have the patience to recycle. This also got old, but not quite as fast. In the end I discovered a really fast and easy way to reconfigure my watering system. It's scalable to the number and types of beds I have active.
Instead of running the PVC pipe to each bed, each time, I have instead run a large bore PVC pipe down each side of my entire garden area. Then at the end of each planting bed I have added a T-junction and a short pipe off to a PVC valve. When I set up a bed for watering I grab a length of the mid sized PVC pipe, attach it to the valve, stake it down so it doesn't move too much, attach all the sprinklers or heads that I need and turn on the valve.
When the bed is no longer active I can turn off the valve and disconnect the sprinkler line. The sprinkler lines get stored over some racks, out of the way, until I need it again. The next time I set up a garden bed, before I make a new sprinkler line, I check what I have stored away. Most of the time, these days, it is a simple mater of connecting an existing sprinkler line and the newly planted bed is being irrigated within 5 minutes.
The advantages of this set up are:
I am not watering beds that don't have plants in them, or more likely only have weeds in them. This saves me water.
It takes minutes to set up water for new plants, so they are less likely to suffer due to lack of time to water.
It is easy to get the irrigation system out of the way for the entire garden at the start of a season so that I can hoe or slash without damaging equipment.
The reuse of PVC pipe keeps the cost of irrigation equipment to a minimum.