Three products get sold as one line item, and they do not behave alike
Search ads, Local Services Ads and retargeting answer different problems, and a budget split without that distinction is guesswork.
Search ads put you in an auction for a query. You pay for the click, you control the landing experience, and you can be as specific as your keyword list is. It is the instrument with the most steering and the most ways to waste money.
Local Services Ads work differently. You are buying a lead at a price rather than a click, the profile sits above the standard results, and getting in requires license and insurance verification rather than bid strategy. Less control, less waste, and a much smaller surface to optimize.
Retargeting buys attention from somebody who already came to your site. In this trade that is almost entirely the replacement buyer, because the emergency caller either converted in the first ninety seconds or is somebody else's customer now.
The mix should follow what you sell. A shop living on same day repair leans hard on the first two. A shop trying to build replacement volume that cannot afford to lose a researcher for three months needs the third, and most contractor accounts do not run it at all.
Splitting the reporting matters as much as splitting the budget. Rolled into one number, the cheap product flatters the expensive one and you cannot tell which part is working.