If she needs the light on to see where she's going, maybe a good compromise would be to use a small night light next to her bed. That wouldn't be very bright but it would be enough light for her to see where she's going.
Another idea is you could buy a bed tent for yourself. It gets very dark inside the tent. It comes in a variety of different sizes.
A mini-fridge is definitely the best option. Another option is buying a lockabox for the fridge. That will let you store some food and other small items inside. It's locked and opened with a combination code. They are pretty small so you won't be able to fit a lot inside of them. https://amazon.com/Lockabox-Compact-hygienic-lockable-medicines/dp/B01KVKMGBE/
This is the sound machine I have
White Noise Sound Machine | Portable Sleep Therapy for Home , Office , Baby & Travel | 6 Relaxing & Soothing Nature Sounds , Battery or Adapter Charging Options , Auto-Off Timer | HoMedics Sound Spa https://www.amazon.com/dp/B00A2JBMRE/ref=cm_sw_r_cp_api_i_NHYFFbV5FRM1M
I live with a really loud person who is up til 5 am most nights. The rain setting helps me sleep like a baby.
You can go to Google Play and look for Room Marker. It is a great app. You can find the best rooms, apartments, and houses near you easily and on the go with it. There are a lot of options to finely tune your search and rent the perfect space. Most ads have photos of the real place so you won´t encounter any nasty surprises when you finally reach your destination.
They won't listen until their shit gets stolen, so get a lock with a keypad and replace it. Most landlords will allow this switch. They're not that expensive and when the battery dies, a key will work.
Like this: http://www.amazon.com/Kwikset-Powerbolt-Electronic-Deadbolt-featuring/dp/B00065D3N0/ref=sr_1_2?s=hi&ie=UTF8&qid=1447396713&sr=1-2&keywords=keypad+deadbolt&pebp=1447396719610&perid=14PJ6SSN8XG5PTX3P26V