It's a great option if the price to set up the "Node" is not almost 100% the cost of a new node. If you consider having a #smartnode an investment then choosing a service where the running cost out weighs potential profits in not good investment strategy. Other options exist which do not cause so much.
Another thing a well set up node on a VPS runs for weeks. From the last upgrade in 02/2018 to the most recent one (06/2018) a few days ago none of my nodes experienced any down time. When it comes to smartnodes this is one area people should take Warren Buffet's advice - invest in what you understand.

Buffett says, “Never invest in a business you cannot understand.”