Consider buying the tank. Here in Michigan it is a little difficult to buy one, but after a half dozen phone call you can find one. You can also buy one from Craigslist some times.
Once you own the tank, you can buy from anyone. They usually require a "gas check" for about $75, but they will often even wave this.

We are moving to a house that uses propane for cooking and hot water, and eventually as part of a hybrid solar/propane backup system for when the electrical grid is down. I need to choose a propane company.
There are three propane suppliers in my area. One was just acquired by Amerigas, which claims to be "the nation's largest propane company" (US); one is a large national company (Suburban Propane), and one is a family-owned local company (since 1941).
Normally I would go with the local family-owned company, but as petroleum prices rise and we face the prospect of shortages, would it be in my best interest to be with one of the larger companies? I'd like to be strategic in my choice. I could base it on their current prices, but that seems shortsighted. The house is currently serviced by Suburban.
Help me figure this out...thanks.