All perfect praise be to Allah, The Lord of the Worlds. I testify that there is none worthy of worship except Allah, and that Muhammad is His slave and Messenger.
If the head of the family, mentioned in your question, recites only the Quran and what is proved in the Hadeeth, then it would be considered as lawful Ruqyah. So, we should not confuse that with what is practiced by magicians and jugglers. Many scholars have declared that receiving wages for such Ruqyah is permissible. They deduced this permissibility from the Hadeeth of Abu Sa’eed Al-Khudri that a person recited Surah al-Faatihah over a person who was bitten by a snake. As a result of that, he received thirty sheep and they also gave him and his companions milk to drink. When the Prophet was informed about it, he approved it.
Therefore, there is no harm in visiting this family or eating from their food if the father abides by the limits of the Sharee'ah in his Ruqyah. However, if he practices magic or jugglery, then you should avoid eating the food purchased with that money.
Allah knows best.