Since you are in Miami, and won't get too much rain after hurricane
season, you can probably get away with a cardboard box about the size
to carry a TV (small one if you need to hide it in bushes) and then
line the outside of it with large trash bag material and duck tape,
and, setting it on its side over a 4 x 4 foot plank of lumber (v.
cheap) or whatever size you can fit into the bushes, and line the
"ceiling" with more trash bag and duck tape.  It should be dry enough
to even lay a few old towels down.  If you think there will be wind,
duct tape the open side with only two of it's flaps into an L-shaped
doorway.  The box is free, the duck tape, plank and trash bags should
come to less than $10.00.  Put a little dish of food in there, and he
might find it the first night.  As long as no one else finds it.  You
got oppossums or racoons there?  If you expect windy weather, put one
or two cobblestones inside to weigh it down.

--tension