Residential solar in the US is very expensive, $3-4/watt versus utility scale closer to $1/watt. The cheapest residential solar options are community solar if your state and utility supports it, or a ground mount system.
The biggest cost components are sales and marketing expenses and similar soft costs. Some of this can be driven down if you collectively buy through something like https://solarunitedneighbors.org/
The biggest cost components are sales and marketing expenses and similar soft costs. Some of this can be driven down if you collectively buy through something like https://solarunitedneighbors.org/
(have installed 100kw+ of residential solar, ama)