Life Estate investment

[Steve L]

Here is my situation, older couple next door and no kids.
They would like to stay there until they pass. They are
in their early 80's decent health. No mortage, they say money
wise, they will probably run out of money in 3 to 5 years and
are worried about not being able to stay in the house.

I would like to purchase the house from them giving them
life estate but not sure of the best way to do this.
Or should I tell them to do a reverse mortgage or get a
home equity loan.

What is the best way for me to aquire the house and give
them life estate without hurting my pocket too much.