Bid the 215 loop first, then decide about Boulder City on its own budget
Geography in a paid account should follow where a truck can finish a call and still make the next one, which is almost never the circle a radius tool draws around your shop.
A radius buys open desert and towns you would decline anyway. Target by city and ZIP instead. Build the core around the valley inside and around the 215, then treat Henderson and North Las Vegas as their own line items, because they are separate cities with their own competitors and their own drive times.
Outlying work deserves a separate decision rather than an accidental one. Boulder City, and anything further out, either gets its own small campaign with its own budget and its own trip charge in the ad copy, or it gets excluded. What it should not do is silently absorb spend inside a metro campaign.
Set location targeting to people present in your area rather than the looser option that includes people merely showing interest in it. A city that hosts constant visitors and constant relocation research will otherwise send you clicks from people nowhere near a house you can service.
Report by geography from day one. Cost per booked job in Summerlin and cost per booked job in North Las Vegas will diverge, and you cannot act on that difference if the account only reports one blended number.