I am a designer of equipment for people with special needs. I design everything from ramps to houses. I also assess for compliance with the ADA= Americans with Disabilities Act.

   This case is a unique problem in a few ways. The person who is having the house concert in most cases wouldn't be required to have a accessible bathroom in a private residence. However the moment it was advertised on the radio and through the performers website the house became space for hire and opened to the general public. As it is now a public meeting space open to anyone with the admission charge it became subject to the rules of the ADA.

You can claim that to meet the accessibilty requirement is an undue financial burden and back that statement if you need to. After all most homes aren't accessible unless there is a familial need.

   Did this person ask about a ramped entry and closed circuit FM radio reception or signing for people with low hearing?

Don