The metro-wide head term belongs to lead sellers, and you will not outspend them organically
The phrase you most want to own is the most contested and the least profitable place to spend a year of content work.
Look at who holds page one for the metro-level phrase. Lead aggregators that sell the same homeowner to three dealers. Manufacturer dealer locators. Franchise sites carrying hundreds of location pages and a decade of links.
The traffic is weaker than it looks anyway. Somebody typing a metro name and a product is usually early, collecting names, and about to ask two competitors for the same measure.
Better ground sits underneath it. A page that answers one condition in one kind of house draws a fraction of the searches and almost none of the competition, and the reader has already decided something is wrong with their windows.
Order matters. Publish the condition pages first, the suburb and county pages second, and the broad metro page last, once there is enough around it to be believable.