Planting/Site work prior to building

[EightFingers]

It's drier at 1st than the higher up lots. There are periods when you need to water. There aren't any albezia trees in that area. Still lots get overgrown pretty quick. In a year, you'll have lots of tall grass and trash trees over 6ft tall. They'll definitely compete with your newly planted trees.
Citrus trees can get aphids bad and the fire ants "farm" the aphids and spread them around. Still, if you get some trees cheap, it might be worth taking a chance.