Many, many years ago my Scout Troop would go out to a farm owned by one of the kids in the troop's Father.
Farm was out around Columbus, Texas, which is one of the prime pecan trees areas in Texas.
We helped lay out a new pecan tree grove on the property.
Planted sixteen trees, in four rows, with 80 feet between trunks.
Dug a 4 inch hole next to each tree, at 3 ft out and 4 ft deep and inserted a 3 inch schedule 40 perforated pipe vertically and filled with gravel for a drip irritation system.
Ran plastic tubing to each pipe with a drip valve.
Watering system to the trees was gravity fed.
There was a large water tank about 12 feet across an 10 feet high that had a cone shaped roof that was upside down and looked like a big funnel to catch rain water.
Tank opening was covered by hardware cloth and window screen to catch the big stuff and keep the tank from becoming a mosquito hatchery.
Water tank could be filled three different ways, by rain fall, float system connected to a well pump, or a gas powered pump that pulled water from the creek.
I'd plant a pecan grove and watch the money grow on the trees.
Declare it a tree farm and take the tax credits (I think it is still possible).