I am also a foreigner in Tongren now and have lived in Guangzhou for several years. I feel that although Tongren's economy is not as good as Guangdong's, the price is not low at all. In your case, you can ask your girlfriend to call the elders in your hometown. In fact, as long as you two have a good relationship, nothing else matters. You can ask your girlfriend to find a middleman (matchmaker) in her hometown, so that you can have a middleman to teach you a lot.