When a Muslim says du’aa’, should he start with du’aa’ for himself or for others?

The du’aa’ which saved the Sahaabi from the thief, in which are the words “Yaa Wadood, yaa Dhaa’l-‘arsh il’majeed (O Most Loving, O Owner of the majestic Throne)”

He is asking about a du’aa’ to bless his business

If a person persists in sin and commits major sins, can he ask Allaah for some worldly need?

He wants to ask Allah for a palace in this world and in the Hereafter

Is it permissible to ask Allaah for a specific amount of money?

He visualizes the Ka’bah when he prays and says du’aa’. Is this ihsaan?

Is it permissible to face the grave when making du’aa’ for its occupant?

Mistakes that prevent du’aa’ from being accepted