[Still looking for a good (cheap) place to stay, link to buslines pls?
Okay, here are all the ones off the top of my head that I am familiar with and pass by campus from accessible locations:
https://www.nctx.co.uk/timetables-tickets-maps/buses-lines/bus/36
£1.70 (£1 with valid student ID), correct change only. Leaves from outside the Victoria centre (middle of the city), you'll want to get off at Uni North Entrance (the bus has an on-board display which tells you where you are)
http://www.catchyourbus.co.uk/businfo/City/y36/y36mftochilwell.html
£1.60 (£1 with valid student ID), gives change. Same route as the 36, just a different bus company.
https://www.trentbarton.co.uk/services/indigo
£1.70 (£1 with valid student ID), gives change. Leaves from the broadmarsh bus station (2mins from the train station), and you'll want to get off at the QMC main entrance (uni north entrance is 2 mins walk from there). Also, runs 24/7 (but is £3.50 after midnight, so unless you're on your own a taxi is probably cheaper).
https://www.trentbarton.co.uk/services/i4
£1.70 (£1 with valid student ID), gives change. Also leaves from broadmarsh bus station, passes by uni north entrance so if there's an i4 around that'll be the best option.
All of these are pretty regular aside from sunday morning, so whichever location you're travelling from, you shouldn't have to wait too long for one

Hope this is useful.
E: whoops, i forgot the direct to campus one
https://www.nctx.co.uk/timetables-tickets-maps/buses-lines/bus/34
£1.70 (£1 with valid student ID), doesn't give change. Leaves from behind the broadmarsh bus station, you can get off right by the science department. The first bus isn't until 8:15 on a sunday, though, so only really useful for saturday
