Teeth cleaning costs differ with various factors one of them is the dental clinic location. It is advisable to visit the trusted dentist in order to get the correct diagnosis of the dental conditions and related costs. 
 

That may mean you are getting a foul breath and produce extra saliva. Those are indicated by a dental or gum problem. I would therefore suggest consulting with the dentist for a complete evaluation and treatment.

There is a chance that the solid, round, and movable object under your lower jaw in the lower part of molar teeth may be due to salivary gland stone or lymph node. But it need physical examination to determine the actual cause.

If he is experiencing blurred vision, it could be due to several factors, including swelling, infection, or simply a reaction to the surgery. It's important to monitor any accompanying symptoms such as redness or increased pain. For now, ensure he keeps the area clean and follows any care instructions provided by your healthcare team. I recommend consulting a doctor to get a proper assessment and guidance, especially if symptoms persist. They can offer the best advice personalized for his situation.