The right type of Blueberries grow almost like weeds with very little attention in some areas but may also grow well with a lot of attention in many other areas.
In my area they require much less attention than Apples or Peaches and slightly less than Blackberries. We let an acre of mature rabbiteye blueberries sit for about 10 years with no water, no fertilizer and no pruning. Only lost several plants out of 700 during the entire time.
Interesting that large growers are producing amazing Blueberry yields (over 25K pounds per acre) in portions of Washington state where you would not expect Blueberries to thrive.
Native “Blueberry Soil” like that found in the Pine Barrens area of NJ or southeast NC provide the perfect soil for growing Blueberries but the growers there can not produce anywhere close to 25K pound/acre.
One of the biggest difficulties with growing Blueberries is starting with plants that are well suited to your area. Most nurseries do not have a clue and are happy to sell you what they have in stock. I recently saw two large local nurseries promoting and selling NHB for my area. Really dumb since NC State has produced research showing that NHB are not well suited to this area for over 40 years!