Regarding the Hadith which is in Sahih al-Jami 6472:من قرأ {قُلْ هُوَ اللَّهُ أَحَدٌ} أحد عشر مرات بنى الله له بيتا في الجنة Imam Al-Albani did Tashih of it ,so can I act upon it?

Ustadh AbdulAziz al-Haqqan

The wording you mention, reciting Sūrah al-Ikhlāṣ eleven times for a house in Paradise, is not an established narration.