I don't completely disagree with your reasoning. I claim to adhere to the 'buy once cry once' but I've definitely been known to settle for middling quality on some things. Not boots, tents or sleeping bags though. Sh*t happens and if you are ever caught out and your situation gets desperate it is really nice to know your gear is bomber.
Hilleberg is the brand that everyone compares to when they say their tent is really good. Properly cared for it will be something you pass on later.