We have a single and cruised 1,000's of miles with no problems and
we fitted a bow thruster when we bought the boat, the only point I would make is that whatever size bow thruster the manuf recommends for your boat go at least one, preferably 2, sizes up.
If wallet and ER permit the hydraulically driven is by far and away the best because when you need a bow thruster in earnest, a, the larger size is more effective and b, a hydraulic will keep on working whereas an electric has a thermal cut-out.