A few ideas.
Few of us live in a gated community, but if you live in a cul de sac the toerags have to both get in and get out, if small enough it can seriously hamper their manoeuvrings. Helps if you have nosey neighbours.
For long term off-the-road vehicles that you cannot put in a building, take both the spare wheel and another wheel off, leave it on axlestand. Preferably the wheel furthest from the road, much harder to tow away, again as others have suggested, putting the steered wheels on full lock and locked with steering wheel lock
If your car is Sorned, check out SORN insurance, it is cheap and will cover you for as long as you want, I think, certainly 6 months.
As for the guy who had his truck nicked from his mate's drive, and got no payment. I have never heard of an insurance that does not allow you to spend a night away from home with your vehicle. If they tried it, I would suggest the insurance ombudsman. I cannot believe this was hidden in any small print