1. re-entry is valid for 1 month or till the visit visa last.
2. Maybe he can travel alone, check Rawda Hajj & Umrah at Qutub Round about, Tel: 44424434, 66767829, 77652117, they will charge QR 800 by Bus for 10 day -Makkah & Madina including Visa, Hotel
3. Exit permit is not required, check with Umrah Agent, even it is required then issue it that cost u 10QR.
last week i came back from Umrah thru Raawda agent , but went by Car. if u need more info regarding Umrah-procedure, makkah location, Dua etc, pls contact me 66914328