We understand that your sister is in a delicate situation, seeking to sell her house to alleviate her financial burdens. We commend you for reaching out and asking for prayer in Jesus' mighty name. It is only by His name that we have access to God, and it is encouraging to see your faith in Him.
Firstly, we need to address the anxieties and desperation. Desperation can easily turn into doubt. And there is no room for doubt in faith.
But let him ask in faith, nothing wavering. For he who wavers is like a wave of the sea driven with the wind and tossed. 8 For let that man not think that he will receive anything from the Lord. 9 He is a double-minded person, unstable in all his ways. James 1:6-8 WEB
The pressing need to sell the house and pay off debts can indeed be challenging, but it's crucial to trust in God's timing and provision. We encourage your sister to remain steadfast in her faith, knowing that God has a plan and a purpose for everything.
Now, let us pray together.
Heavenly Father, we come before You today, lifting up the sister who is seeking to sell her house. We pray that the buyer who has shown interest will come with a willing heart, ready to purchase the house at a fair price. We ask that You orchestrate this situation according to Your will and in Your perfect timing.
Lord, we also pray for her financial situation. We ask that You provide for her needs and guide her in managing her finances wisely. Help her to trust in You completely, knowing that You are her ultimate provider.
Forgive her sins, Lord, as she has asked, and perform miracles in her life. Let her prayers be answered in Jesus' mighty name. Give her peace and strengthen her faith during this time. Help her to fix her eyes on You, trusting that You have a good and perfect plan for her life.
Lord your word says in Matthew 6:26-34 NIV 26 Look at the birds of the air; they do not sow or reap or store away in barns, and yet your heavenly Father feeds them. Are you not much more valuable than they? 27 Can any one of you by worrying add a single hour to your life [a] ? 28 “And why do you worry about clothes? See how the flowers of the field grow. They do not labor or spin. 29 Yet I tell you that not even Solomon in all his splendor was dressed like one of these. 30 If that is how God clothes the grass of the field, which is here today and tomorrow is thrown into the fire, will he not much more clothe you—you of little faith? 31 So do not worry, saying, ‘What shall we eat?’ or ‘What shall we drink?’ or ‘What shall we wear?’ 32 For the pagans run after all these things, and your heavenly Father knows that you need them. 33 But seek first his kingdom and his righteousness, and all these things will be given to you as well. 34 Therefore do not worry about tomorrow, for tomorrow will worry about itself. Each day has enough trouble of its own.
Father, let her be encouraged and continue to seek you. Help her to fix her eyes on You, trusting that You have a good and perfect plan for her life. Thank you for the gift of prayer and Jesus Christ.
In Jesus' name, we pray. Amen.
Articles:
Let's pray for Smilee's request for forgiveness and a testimonial life. "If we confess our sins, he is faithful and just to forgive us our sins and to cleanse us from all unrighteousness." (1 John 1:9) Trust that God's grace is sufficient! 
Hello everyone! Let's lift up @Ploodaroormir for a financial breakthrough, @Valdoywell for more customers to her Agrovet, and @Wiyside for a miracle in her marriage. Also, let's pray for salvation of lost souls, healing from Bell's Palsy, and breakthroughs for those facing challenges. Remember, God is in control! 
Share your prayers and support in Jesus' Name. 
Friends, let's lift up @Wexaorhill for a job breakthrough, and @Anonymous for renewed faith. Pray for @Ceulfaire’s healing, @Craydoraorser’s antibiotic safety, @Ploodaroormir & @Valdoywell’s financial blessings, and @Wiyside’s marriage. 
Let's lift up:
Jesus is listening.
