OK Here are some interesting things about tying down for 20 years in the snow, rain, and sun. First, I can't believe how bad my typing was.
I did not mean to attack Patch or Waiter. I look forward to their valuable information. It just seemed that they were relating how good it was that they had the hanger and not directly answering the question. My apologies guys. I would prefer to have a heated/airconditioned spot with full tools, carpeted floors, a guard and live in an airpark but that is not the reality for me.
1) I live close to a large city ( Chicago) and the rates go up the closer you get, It is possible to drive 50 miles to get a $50 hanger But I live convenienetly with 2 miles of my tie down.
2) The brake rotors will get rusty each spring. A little light sanding will cure this for the summer. They last 5-6 years before pitting bad enough.
3) I get some light rust on the bellhorns on the rudders But I have not replaced the horns or the wire spools in 20 years.
4) Surprisingly, nothing inside the cowl or the cockpit. No rust anywhere. That is nothing that a toothbrush or rag won't knock off.
5) water will find it's way inside around the canopy but only in a very heavy rain. It winds up in the nose. The first year I put in drains in the nose and this solved the problem.
6) The sun beats up on the seats. I been throught three sets. I learned to sew so this was solved.
7) I had two covers for the winter,. The water and dust would collect under the cover and grind into the paint. The covers made it worse so a good waxing was done. It was like candy apple
paint but the candy sparkles were dirt imbedded in the paint

I check the wing bolts each spring and have yet to see anything.
9) Birds are the major problem. Plugs must be inserted from April to July.
10. I replaced the rudder cable tubes once. I think the heat expanded the tubes between the the Bid layers that hold the tubes to the side walls. This scalloping stiffened up the cables and the rudders would not spring back.
The plane still looks good afetr the first spring wax. Better than some hangared planes that I guess were not well cared for.
There is a fence around the airport so there is not much of a people problem
These have been both the major and minor problems.
I could put out $150 for a hangar but would be at least a good drive to be outside the chicago area.
Working on the plane. I have to wait for a good day But there are plenty of those.
The biggest problem is I don't fly from December to late March. I don't have a heater. I don't know that a hangar would change this
In conclusion, these are really tough planes and we are all proud of them. Inside or outside there is not much to worry about. Rain, snow hail, -20 degrees and over 103 degrees.
I think I would worry more about South Florida and what those poor guys have to deal with.