Screening inherited tenants

[Steven Pool]

So I've purchased 1 duplex and 1 sfh each with inherited tenants; I also have 4 more duplexes and 1sfh on contract to close at the end of this month and each of them have inherited tenants

Of these, only 1 has a year long lease while the rest are on month to month.

What I've done with the tenants I have so far is to keep them on a month to month lease until I can see what type of tenant they will be after which I can decide to end the lease with a 30 days notice.

There are definitely flaws with this approach so I'm wondering what most of you have done when inheriting tenants?

Thanks in advance for the help!