On the ground in Midland
Midland and Odessa function as one market with two personalities. They share an airport and a DMV, and the highway between them has filled in to the point where there is barely an empty lot left on it — churches and restaurants have opened halfway between the two because nobody out here thinks twice about a twenty-minute drive. Most oilfield work happens outside either city's limits, so long drives are simply how the day is built. For an HVAC shop that has a practical consequence: your service area is larger than your city, and the real constraint on the day is drive time between calls rather than distance from the shop.
What sets Midland apart is who is on the other end of the phone. The white-collar side of the basin concentrates here — offices, administration, professional services — and a large share of the people filling those jobs drive in from Odessa each morning, because the pay is better on this side and the housing is cheaper on that one. That shapes your calls in two ways. First, the homeowner is often not at the house when the system quits; the call comes from a desk in the middle of the afternoon, about a home nobody will reach until evening. Second, that same customer has less room to sit on hold or try again later, because there is a meeting waiting.
Houses are going up steadily in both towns, but Midland's new construction sits at the higher end of the market, and customers at that end tend to judge a shop by whether it can commit to a time.