Murky world of insurance

[PaulRichard]

Firstly, apologies if I'm posting in the wrong forum. I have a question regarding insurance. The situation is simple. My friend and I are hoping to purchase a Porsche 911 Turbo and car share. The idea is to essentially lok after and use the car for 6 months of the year each - split into 6 week chunks (We live around 40 miles apart so not that local to each other). This poses a problem for insurance companies as the car will be located at one of two addresses and will change every 6 weeks or so. Have spoken to a number of companies/brokers. In general, there is a lack of interest in entertaining this scheme. We were wondering if there is anybody else out there who is already car sharing in the way that we've suggested and if so, what they've done as far as insurance goes. Any help anybody can give is warmly received. Thank you