Smiffy - someone will be along with good (better than mine) advice I hope!
Here's what I do for getting through winter: Easy, cheap and affordable
Make them using rubbermaid containers. buy at Home Depot or Lowes,
and have them cut a hole in one side for you of the container (need
an electric tool / saw for this). Size of a large coffee can lid (I use
the plastic lids, trace a circle and cut it out).
Now for the stuffing! If you can - get some of that nifty bubble wrap for pipes that they sell... it is used to wrap water heaters and pipes in cold
areas. Cut it (cuts easily w/ siscors, and put on the bottom and sides
of the container. Use duct tape to secure it. Put about 1 inch or 2 of newspaper on the bottom of the container. fill it with STRAW not hay.
You can buy the straw at a craft shoppe for about 5 bucks a "mini bale"
If you can't find the bubble wrap, see if you can get a scrap or two
of that nice foam and foil insulation used in houses they also sell at home depot and Lowes. Alternately, you can use a foam mat that they sell at the sports stores for yoga (thinner one of course) and cut it up. Put the foam on the sides, bottom and if you can top lid inside.
Put the lid on the container et voila - instant shelter box!
Place the shelters out of the wind, put a large brick or rock on
top to keep from moving/blowing in the winds...
You will need about 1 mini bale per container depending on size. Make 2
smaller or one larger shelter box - it depends on no. of cats and if they
all get along. I like more boxes for "variety" and so I can move em around.
A large shelter will run you about 15 to 20 dollars if you do it this way.
2 smaller ones might cost 15 apiece.
For food and water - create a feeder by getting another rubbermaid and putting it on its side. PUt the lind "inside" the container bottom, so
there is a slightly "raised" surface. anchor with rocks or bricks, and
put food and water out "under shelter" so to speak for the rainy days
My colony of 13 cats shelters in these boxes, and eats this way in
the tough parts of winter, and they've come through 2 years now
in fine shape. They love their cozy (smaller) rubbermaids - houses
2 cats at a time. also have a large dog igloo faced away from winds
filled with Straw. They nest in that too.
As far as HOMES. Petfinder. and of course you MUST MUST get hooked up with a low cost spay neuter and get that done. Its really important if you don't want more and mroe kitties! Also perhaps you can find a group that will help sponsor. Flyers at Petsmarts or Petcos and local vets. Last resort ads in paper. Make SURE you ask for a financial dontation IF you do the ad route - 75 dollars at least - otherwise you could have your cats bought by someone who will resell to animal testing reserch labs! Eeeks!!