I've had twins and singles. Had a gear failure on the twin, came home on the other. On the singles, never had a propulsion failure. Did have to get towed when a new rudder arm fractured, apparently a casting flaw. At the time had no provisions for backup rudder control, that has been remedied. Have had a few issues with the single engines, leaks, impellers, stupid tank management by me, etc, all easily remedied without mission failure.
I still prefer the single, even though there will remain an increased chance of needing a tow. To me the tow option is just another tool in the tool kit. Use it if you need it.
Twins will have a higher probability of having a problem, but a much lower chance of needing a tow. And that problem may ruin trip plans, whether a tow is needed or not.
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