A person did umrah from the hotel 13 times and did not go to the meeqaat (masjid Aisha) each time, what is their ruling?
بِسْمِ اللهِ الرَّحْمنِ الرَّحِيْم
In the name of Allah, the Most Gracious, the Most Merciful
A person who wants to do another Umrah must leave the boundaries of Makkah [e.g. at Masjid Aishah] in order to start a new Umrah. If this is not done then their wearing of Ihram is not technically valid. Therefore, the tawaf that they performed will inshallah count as a proper tawaf but their sa`y between Safa and Marwah would not have been part of a proper Umrah.
Another possibility is that they could be considered to have worn ihram at the wrong location and be analogous to someone who crossed the miqat boundary without putting on ihram at the right time, in which case the sacrifice of an animal [a sheep] is due for each Umrah.
Only Allah knows best
Written by Maulana Mustafa Umar
Checked and approved by Mufti Mohammed Tosir Miah
Darul Ifta Birmingham
 Kitab Al-Ikhtiyar 1:183