You are ruling out providers like OVH because lack of sufficient SLA but then you are replacing it with your own solution that will have no SLA.
Lower your SLA requirements and go with multiple providers like OVH. Make your site work at multi datacenters. At the end of the day your users will be much happier.
Lower your SLA requirements and go with multiple providers like OVH. Make your site work at multi datacenters. At the end of the day your users will be much happier.
My 2 cents.