You haven't heard of Amazon and their web services? I don't think you can guarantee 50 years, regardless of number of services used. But you'll have plenty of

You haven't heard of Amazon and their web services? I don't think you can guarantee 50 years, regardless of number of services used. But you'll have plenty of time to offload them before any of these big names shut down. Also, I'd guess this is your best bet for > 50 years.