Dear Sri Ramesh,
Are you a full time farmer? if yes you can grow, the following, any.
Custard Apple . Arka Sahana ,variety of custard apple , of iihr, or Balanagar variety ,a local variety of Telangana area. This can be cultivated iwith very little water.
Aloevera . this can be grown with very very little water.
Country chickens. Fence all around your coconut garden with 6 ft height 3 inch x 3 inch wire mesh , construct small shed of size 10 ft x 16 ft with sheet roof, with side walls. make partition at 8 ft lg. use them as brooder rooms. you can grow 3,000 country chickens comfortably, In 10 acres garden .
every 2 weeks, get 65 one day old, country chicken birds, keep them in a brooder room for 3 1/2 weeks and afterwards shift them to the main shed. same like,in the 2 nd shed after 2 weeks.grow them for 20 weeks and they can be sold in the markets for good price. 70 % to 80 % of the feed will be available for chickens in the farm it self and you have to give remaining feed to them in the evenings.
As per study of univ/Institutes, 300 nos of chickens can be grown in an acre land. Chickens requires very less quantity of water per day.
Pl select one of the above and make good money.
with best wishes, g.p.rao, farmer