Ballwin, Belleville and the Central West End should never share a bid
Geography is the biggest single control in a remodeling account here, because a short drive crosses a dozen governments and, in one direction, a state line.
A radius does not describe your territory. Drive west from Ballwin and you are still working the same suburbs. Drive east twenty minutes and you are in Illinois, in a different permitting world, on the far side of the Mississippi.
Build targeting from a list of places you actually serve. The City of St. Louis on its own, because it is an independent city and buyers treat it that way. The county municipalities you cover, named. St. Charles County if you cross it. Madison County and St. Clair County if you work the Metro East.
Then bid them apart. Job value, close rate and drive time all vary by area, and a flat bid pretends otherwise. A lead that costs you a full afternoon of windshield time is not worth what a lead ten minutes away is worth.
Set location targeting to people in or regularly in your area, not to people showing interest in it. Otherwise you buy clicks from somebody in another state reading about kitchens.