You're comparing a subdivision to an urban block, and you're not including time and cost to clear LOS obstacles. It's also very unlikely that 4 small poles will

You're comparing a subdivision to an urban block, and you're not including time and cost to clear LOS obstacles. It's also very unlikely that 4 small poles will have direct line of site to 150 households outside of high density apartment buildings where running fiber directly to the building is already easy.