Tent is the obvious weak point in the pile, so I'm trying to imagine situations where it might shine.
You could build the golden deck with 3 tents + 2 merchant camps, or 4 tents + Capitalism. But, this relies on specific combos and over half the tents, so I'm thinking this is rarely viable.
The other thing I can imagine doing with it is quick rotation. The first time you draw Tent, buy Garrison. Next turn, buy Hill Fort. Next turn, rotate to Stronghold and leave it there. Your opponent only has a small window of opportunity to get each card, and they might miss the price point or have to overpay. Of course, you might miss the price point or overpay too, but Tent is good for hitting price points, and you can always opt not to rotate.
Is it good to have the only copies of Garrison/Hill Fort? Garrison seems pretty strong to me, comparable to Livery--but I think having only one copy would be very spiky. Maybe stop for two? Having the only copy of Hill Fort seems great--maybe you could gain some villages to offset all those terminals you bought.