Well I phoned my dad and mentioned I had seen some tankers go by filling up other people's propane tanks to get the convo going. I asked about cost and it possibly being cheap/ free and he said it's the cost of running the piping in the house and since he still unsure of what's gonna go where he doesn't want anyone coming to set it up. I told him I'm still very very uncomfortable with the tanks leaking/exploding to which he replied the setup is safe, the tanks aren't beside the oven and if I feel unsafe just use one tank and that it's like a bbq! I don't even like using bbqs! I could tell he was getting irritated and he wanted to go for a nap so I just left it at that.