Two people take twice the vacation of one person, have twice the healthcare costs, etc. It is almost always cheaper to have 1 person work 16 hours than it is to have 2 people work 8 hours.
Also, just bring in more affordable doctors from overseas. Have them take a test to qualify.
US doctor comp is much higher than any of our peer states due to industry protectionism. Other industries don't put a cap on training and licensing and haven't been so distorted.