Sprinkler systems

No booster pump needed for domestic water if the system is designed properly. Test the pressure (psi) and volume (gpm) off of a hose bib and follow rainbird or hunter design guidelines based on the numbers. Domestic water is expensive for irrigation. Get a 3/4” convenience meter if you want to go that route so you don’t have to pay for sanitary sewer charges (retest psi and gpm). I would drill a well if it’s allowed. The water is probably better for the plants and lawn, but it may stain sideways, fence, and house if heads aren’t adjusted perfectly.

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Get a second meter just for sprinkler system. No need to pay sewage costs.

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Depends on the city and county. Not all of them will allow you to bypass the sewer charges or have an option for a irrigation only meter..

they had a well when they moved in and used it but it no longer works.

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See if the existing well can be fixed

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tried that years ago. the installer either was incompetent or didn't really want to do it. or both. the old pump was stuck in the casing and couldn't be retrieved. or something to that effect

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If you tap into the existing domestic water supply, a backflow preventer is required by code between the systems to make sure you don’t contaminate your own water supply. Having the water supplier install a convenience meter (no sewer fees) solves this problem as the systems will be separated, and the meter will have its own backflow prevention.

Drilling a new well will almost certainly be cheaper long term unless rainfall is consistent in the area. I would price it out all 3 ways and then decide. There may be other factors like the yard guy may not be able to maintain a well.

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I don't know what the cost of drilling a well is in Louisiana but where I'm at in Texas it seems they start around the $30k mark and it is priced by the foot. So if they don't hit water until 300-400' it gets real expensive real quick. And you DO NOT want a shallow well or you'll be paying to start the process all over again. OP definitely needs to get another company out to see if they can free the jammed well.

Also, the previous houses I was in, if you had city water, the municipality wouldn't allow you to drill a well.

I'm on a well where I'm at now because we simply don't have city water. And I water the hell out of my lawn. My well is 350' deep and has over 100' of water on it. My grass stays hella green. Talking to the well company about how long well pumps last, she said they're usually 10-15 year pumps if you don't have a pool or irrigation. Pools and irrigation seems to zap about 2 years off your life expectancy each. I have a pool and irrigation system so I'm guessing the pump will have to be replaced in the next 4 or 5 years.

I have thought about buying a 2000 gallon tank to put on my property for water recovery but I am not sure how long 2000 gallons will last me or how many years, if any it would save me on my well pump.