Buying occupied rental w/ no lease agreement

[Roberto Ramos]

One of my leads is a mobile home that the owner is renting. She does not have an official written lease but says the verbal agreement she has with the renters will end in December 2019. Should I pressure this lead? If so, what options do I have as far as the renters? Should I make them sign a lease that ends in December per the verbal agreement?

Are there any other things I should look out for?