Your description of Phoenix indicates possible health issues. Abnormal poos and temperature extremes. I'd recommend seeing a rabbit savy vet as soon as you can.
We bought one of these when we traveled cross country from NY to AZ last month. The size was 36' long by 22" wide whichI believe is the one you are looking at. It slid right into the back seat of our car very easily. We only have one rabbit so she had run of the entire cage. We put her litter...
The Water Buddy bottles can still be obtained even though they may not be currently manufactured. Check Amazon web site for both the 16 oz and 32 oz. Also, you can buy repair parts for these bottles from http://www.agselect.com. Look under small animal watering.
We purchase a 10 pound bag of pellets and portion it out into one week serving amounts. Example - we feed 1/8 cup in the morning and 1/8 cup in the evening per day. One week is about two (2) cups of pellets. The 10 pound bag will last about seven (7) weeks. The portions are sealed in(Foodserver...