I ended up leasing a argon tank. It is a permanent lease, I put a $240 deposit and will pay for refills. If I ever decide to terminate the lease, and return the bottle, I get the deposit back minus 25 dollars.
I ended up getting a 300 CF tank. The deposit does not matter as much, but filling it up is barely more expensive than filling a 140 cf tank. $77 vs. $56. So, I would save myself some trips and money, in the long run.i