Hi,
I live in Round Lake (I moved here about 7-8 months ago). I bought a townhouse in the area for your price range. I don't know about houses since I wanted only a townhouse. Our's is about 1800 sq ft, 3 bedrooms, 2 1/2 baths. So if you can't find a house, a townhouse might be a good option. There are a lot of kids in our neighborhood.
I am seeing Dr. Haggerty in Highland Park. A bit of a drive but it was the closest Dr. that didn't make me go through the seminar and other hoops. There are some Doctor's in Gurnee area as well as McHenry County. The doctor I spoke with in McHenry county also had an office in Vernon Hills but they were very rude to me when it came to insurance. They didn't believe that I didn't need a referral and they wouldn't speak with me until I had one. When I am on a PPO plan how am I going to get a referral. Long story short there are plenty of doctors in the area so you should have no trouble finding a doctor.
Hope that helps.