Could somebody please tell me how often these promotions are offered?  Are they random or do they occur frequently?

I've looked and can only see flatmates wanted.  I don't know where I can post.  Do you think I should post photographs?  I do live on a very secure property and only want to offer board to another female.  Full board - nice home - nice appliances - and does $200 a week sound fair?  Everything in the bedroom is brand new and high quality...Waterview - but we are stuck between areas of high crime, though this property is very safe.  Please tell me how to go about this? 😊