Harbor Freight is going to be your go to spot. Get a coupon from online and you can even get a real tape measure for free.

If it were me, I would use a hand truck. You can get buy a small one for 20 or 30 bucks from Harbor Freight. If you feel that this isn't sufficient, rent a furniture hand truck from UHaul. I think is $10 or $15 for an all day rental. The furniture truck will have larger wheels, a wider base, and a strap to hold the cage which will make it much easier for you.

You'd be amazed how much you can move by yourself, even on stairs, with a hand truck. Just take your stairs slowly, one step at a time, and you should be fine.