Yes you do get concession on the airport flyer bus A1 I think it is 50% but contact BRS airport of Facebook and they will know for sure the discount
The bus is 24 hours which is handy and I would look at living close to the bus route
https://flyer.bristolairport.co.uk/stops-and-maps Living in Bristol city centre is fun for the nightlife and cafes Etc - plenty of flat shares I would have thought - Ask EZY jet if thy have a list of crew sharing and accommodation
Living outside BRS gets a bit rural
The holiday Inn has a shuttle - you will have to ask them about crew using it