First investment property (College Student)

[Jack Inman]

Alright guys I just wanted to post a little bit about my deal so that maybe some of you wiser folks could chime in. 

I'm paying cash (60k) for a house with 4 bedrooms and 1 and a half baths. It is currently rented at a little over 900$ a month with property taxes and insurance taking up $143 a month. The tenants (middle aged african american couple with 1 son my age who stays at the house sometimes and 1 older son in the army who does not live nearby)  have been there for 11 months and claim they have no interest in moving and claimed to have no grievances with the current landlord. The house is spotless and the yard is well kept, they both claim to have jobs, and the rent roll shows they have paid every month though some months have been a week or two late. 

Now things that make me uncomfortable: The lease is a month to month lease; the tenants have been paying the rent in two sections for the past three months (500 on the first and 450 later on in the month) and this month they paid 500 on the first but have yet to pay the second installment (450) as far as I know.  

So worst case scenario; I will get the house and have tenants who are behind payments and may cease to pay altogether. Since it is a month to month there is little commitment. 

I would love to hear some opinions.

 Assuming that the neighborhood is stable, the house is structurally sound, and the price of the house and monthly rent is around market value.