Newb question for a rental with detached garage issue

Hi,

I'm trying to figure out a low-cost camera option (better than fake with blinking light) for a rental property. The motion light on the detached garage has been stolen multiple times, (near an alley, at head height, no there isn't a better place to put it that's useful) I'd rather stop spending time and money replacing it and I'm sure the thefts are worrying the tenants.

The issues are:

1) The detached garage is a good 30 feet from the house, which is the nearest place high enough to make it hard to steal a camera/light.

2) There are tenants who are responsible for internet, so I need something that records in a way that is not dependant on their wireless networks (easier for me, less intrusive for them).

Things I have:

1) Power: sockets in the garage and a now bare spot where a motion light was wired (the caps are still on the wiring, so either it was a considerate thief or the light was taken off perfectly), as well as a motion light a story up on the back of the house that has a straight line down the side of the garage to where the light was stolen

2) A tenant-free room in the basement where I could put a DVR/Harddrive to record things that has electricity and could probably have cable run into it.

What I was thinking:

1) Set up a camera on the garage that could wireless broadcast a signal to a DVR (I've seen ads setups that broadcast to its own router to record/display on amazon but no idea if they're any good), either with the hardwiring where the light was, or adding it near the light in the garage

- this is the thing I was least certain of productwise

2) Replace the light on the back of the house with a camera/light combo that would record the side of the garage and back yard

- If I can't do 1), this would need to take good images at 35+ft

Any recommendations on good product, or alternative solutions would be really appreciate.

Thanks

Specifically, I was thinking this might be best for my situation:

Uniden UDR444 Guardian 4.3-Inch Video Surveillance System with 2 Cameras (UDR444)

http://www.amazon.com/gp/product/B00BIY0DFY/ref=ox_sc_act_title_1?ie=UTF8&psc=1&smid=A2L77EE7U53NWQ