What are you planning on doing when it drops to 0 gallons per minute?
A family of 4 can live on 1/2 gallon a minute. The fruit trees, IMO, aren't likely to make it though. Find out the average depth of wells in your area. You may need to drill deeper or drill in another location.
BTW if you bought the property under the assumption that the well was producing 1-2 gallons a minute you may have legal recourse. A half gallon a minute is not considered a viable water source in my town.