It was annoying but it wasnt "the end of the world"...
I dont know what industry youre in but I'm in IT and when I design a service I consider its importance to the business and the risk and impact of it failing (all things fail)
If the risk or impact is high... I design a HA solution using enterprise grade tech. Its expensive but it will "always" work as I cant afford it not to.
If the risk and impact is low enough... I might let my guys skimp a little on the HA or accept some risk of outage.... I can afford to save on the initial outlay because the cost of taking the risk is low.
You have already identified the risk and impact of being out of contact to be high and yet you chose to invest in a low cost solution which you then compounded by factoring in no HA...
Yes yesterday was a PITA but your loss was a result of you underestimating your requirments. Take it as a learning point and move on