codewalker is your best bet takes some time to learn but better then any in game "map editor" for GTA V
you can add auto spawn for said ped and i do believe its infinite or you hit some in game limit

Best posts made by _tobi
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RE: How to remove Limitation Spawned Entities ? Object Spooner/Menyoo
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RE: How to remove Limitation Spawned Entities ? Object Spooner/Menyoo
the limit is placed there for a reason i believe and there noway around it