He could always get a long hose and leave a bigger bottle outside? Personally I would rather have the propane than the Kerosene.

I think that one is similar to the one he is looking at

Derek (the stepson) bought a 100lb bottle that he put outside. He then got a 15 foot hose and ran it inside the house. They have a gas burning fireplace in the basement that was never hooked up by the previous owner. It worked really well for what it was.

I was nearly killed by a kerosene heater in the early 1990's
It was one of those old Coleman camping heaters

I THINK that propane burns a lot better/more efficient without the dangers of kerosene.

No
With properly maintained equipment they are about the same
The thing is to ensure that what you are using is designed and certified for indoor use
And you need to allow fresh air into the area

Pauline had two cousins that died from carbon monoxide poisoning
When the propane furnace in the trailer they were staying in malfunctioned

Yeah I wouldn't want to use an old one, like we had when I was a kid.

Oh NO! Oh man that had to have been hard to handle.

And lot of people died from those old furnaces malfunctioning

When the kerosene heater malfunctioned we were lucky that we were all awake
Even so it wasn't until Corey opened the trailer door to take a leak that it hit us
All three of us were on the ground vomiting seconds after the fresh air hit us

2 out of 3 of the children died
Huge family rift over it that remains to this day

It's a shame that the remaining family is fighting because of this tragedy. They SHOULD be trying to con soul each other.