Solar-Powered Tent — Flexible photovoltaic cells generate 800 watts of electricity on a roughly surface. This could enable the charging of gadgets, night vision goggles and more without the need for a generator.
Pondless Backyard Fountain Pond and Waterfall. Even without the fountain, which in Az will grow algae like nobody's business, I think the idea of softening up the patio with a little rock garden with plants mixed in.
bucket table for the deck. this is a genius idea. you can store all the stuff in the table that you don't want to leave out in case it rains (citronella candles, pillows, etc.), then just grab it out whenever. Perfect for deck or patio!
Outside shower/bath why do I need an outdoor shower/bath? Because I have a metal smithing/garage/art studio and an outdoor garden which I like to keep my house clean when coming to & from these spots, so a shower would be nice, plus I have the space.