I've tried restrictions such as you mention Wompet, but I find that a kilt jones simply won't let something as simple as a self-imposed restriction stand in the way of yet another kilt order.
(although the budget in itself can be a very practical restriction in itself!)

Besides, were I to put those restrictions into place, in my case, I'd be in kilts up to my ears!

3 clan connections = 3 trad tanks
U.S Navy vet = yep, another tank
piper = can't pipe in p**ts!
Colorado resident = state tartan
Texas native = bluebonnet tartan
U.S. Citizen = Bicentennial tartan
highland granite tartan = trad tank (....no problem, I'm a geologist, so I can 'legally' wear that one)

So there are 9 tanks right there. Good thing I'm limiting myself!