Affordable vets for X-Ray/Surgery

My pup is currently dealing with an upset stomach. We decided to forgo the x-ray and try to treat symptoms at first as this has happened before and we feel like we wasted $1000. Any recommendations on places that are affordable and have reasonable pricing for x-rays and surgery, If it’s needed? We are just north of the 610 loop but inside and just outside the loop location wise works for us or even in the memorial area.