How do I put in a sprinkler system?

Is it possible for older home owners to put in their own sprinkler system? We have about 1.5 acres to put it in then need to put a lawn in. The estimates we have had range from $10,000 to $ 60,000. These amounts are way out of or budget!! We are in our mid 60’s and are retiring soon so we will have the time to do the work.Thank you,Linda John

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