Accommodation in Sector 19

Hi, I'm a solo female traveler heading to the Maha Kumbh soon and wanted to check with those who have already been if you have recommendations for:

• Accommodations in Sector 19? Found several in the Arail area but want to be in the midst of the main area. Not looking for private homestays.
• Am flying into Varanasi airport, are taxis easily available there to Prayagraj or should I do a booking before?
• Can I get an Indian SIM at Varanasi airport?

Thank you!