Their is no more Qatarairway visit visa? It was stop Jan/2006, and no more one month airport visa? As you mention person visting Qatar is above 70YRS, their is one option you may contact to main person who was incharge of this and subject to his approval (He is available in main madina khalifa passport office on first floor? most of people was get approval on justify the reason to bring Qatar, If he satisfly, he will approve..........go and try......Good Luck,