How much would you ask your landlord for inconvenience

[Andy A.]

Hey folks,

I am helping a "tenant" friend decide how much should he ask his landlord for the following inconvenience. Landlord's Listing Agent is preparing the house for sale while tenant is still living in the house. House is in SF Bay Area, California. Landlord's Listing Agent is requesting Broker's Open, 3 hour open house Sat/Sun for 1-3 weekends, several possible private showings.

What would you ask landlord for inconvenience? A months rent? In this area, one month rent is about $3000.