I do not use my VPS to test Expert Advisors. I have an old pc I use for this purpose which I leave running 24/7. If my power goes out or the internet is down, which does not happen often, I just take note and continue on with my testing as a few yours when the power is down or the internet is down is a small period of time compared to testing for a week or more. A few hours when the internet is down does not affect the overall testing results.
Alan,