A click from Georgetown and a click from Buda are an hour apart on I-35
Geography, not keywords, is the first split in an Austin roofing account.
Draw campaigns on the areas your crews cover, with their own budgets. Central Austin, the Williamson County corridor through Round Rock, Georgetown, Cedar Park and Leander, the Hays side through Kyle, Buda and San Marcos, and the western Hill Country runs out to Lakeway, Bee Cave and Dripping Springs are four different auctions with four different job mixes.
A single radius setting treats all of that as one market. It is not one market. Drive time changes what an appointment costs you in crew hours, and an estimator crossing town twice in a day is an estimator who saw fewer roofs.
Set location targeting to presence rather than interest, and exclude the areas you will not serve rather than hoping the bidding sorts it out. Reviewing the geographic report monthly and pruning is dull work that consistently pays.
Budget follows capacity. If the Williamson crew is booked three weeks out and the south side has openings, the spend should reflect that, not an even split written in January.