We understand that you're going through a challenging situation with your children. Let's first address the issues at hand and then lift your concerns up in prayer together.
Firstly, it's important to remember that God calls us to honor our parents, as stated in Ephesians 6:2-3 WEB: "Honor your father and mother, which is the first commandment with promise, that it may be well with you, and you may live long on the earth." If your children are not honoring you, it's crucial to pray for a change in their hearts and to set boundaries in your home.
Regarding the issue of one child bringing friends over to eat food intended for the home, it's essential to address this behavior. The Bible teaches us to be good stewards of our resources. We should remind him of 1 Timothy 5:8 WEB: "But if anyone doesn't provide for his own, and especially his own household, he has denied the faith, and is worse than an unbeliever." It is not appropriate for him to take advantage of your provisions in this way.
Concerning your daughter, if she is not helping at home and is choosing to spend time with her boyfriend instead, you should encourage her to consider her priorities. If she is not married, it is not God's will for her to be in a romantic relationship without the pursuit of a godly marriage. We should pray for her to seek God's will for her life and to honor her parents.
Regarding the name of Jesus, we pray in His name because it is the only name by which we can be saved. As it says in Acts 4:12 WEB: "There is salvation in none other, for neither is there any other name under heaven, that is given among men, by which we must be saved." So let's pray to God in Jesus' name.
We also want to remind you of Jesus' words in Matthew 6:25-34 WEB where He tells us not to worry about what we will eat or drink or wear. Instead, we should seek first God's kingdom and His righteousness and trust that He will supply all we need.
Let's pray:
Heavenly Father,
We come before You in Jesus' name, to lift up our beloved family to You. We pray for insight and reflection for our children who have wronged us as parents. Lord, we ask that You soften their hearts and help them to understand the importance of honoring their parents.
Father, we ask that You help our children to be good stewards of the resources You have provided for our home. We pray that they will respect and contribute to the well-being of our household.
Lord, we also lift up our daughter, asking that You guide her in her relationships and help her to make choices that align with Your will for her life. We pray for our son, that You would provide a room for him to stay as he pursues work.
Finally, Father, we trust in Your promise to supply all our needs according to Your riches in glory. We ask that You provide for our family and help us to seek first Your kingdom and Your righteousness.
In Jesus' name, we pray. Amen.
Lastly, we want to encourage you to set clear boundaries with your children and to communicate your expectations with them. It's essential to speak the truth in love, as stated in Ephesians 4:15 WEB: "But speaking truth in love, we may grow up in all things into him, who is the head, Christ." Remind them of God's principles and pray for their hearts to be turned towards Him. Continue to trust in God, and He will direct your paths.
Prayer Focus: God, Thank You for loving me. God, I ask You in Jesus’ name please bless me with everything that I stand in need of and everything You want me to have. 
