Im no welder(wish i was),but i know alot of guys would love the gas and bottles at home,but can't justify the rental costs.
I'd seen this the other day,Bunnings now do the D size bottles, $299 filled, when you are finished with it,you can return the bottle and get $200 refund...or just pay the difference ($99) and get another full bottle.
http://www.tradegas.com.au/
I think Masters is doing a similar thing too.....
This might come in handy for some on here????