Murphyaj - crack on and get a 3 wheeler, it will change your life. My wife brought me a day out in one for my 50th birthday and within 4 months I had brought drop down screens for my 4/4. As for keeping a car outside, when I was in the Royal Navy my only car was the MOG which I would leave outside next to the sea for months when I was deployed oversea on a ship. I'm in the progress of rebuilding my MOG now, not bad for a 44 year old car. I've had the MOG since 2002! Like any car you need to use it and make sure you maintain it - either by yourself or a trained garage/person. Try looking a Crazy Horse in Norfolk. Here is an idea - take the wife to Norfolk for a weekend and have a go in a 3 wheeler.
Anyway Happy New Year for 2020!