But I want to have my first unit ready to be rented in August, and worry that inherited tenants might over stay their notice.So my question is, should I prepare for them not to leave when I plan and start the eviction process?

I'd be prepared to explain, politely, that you're able to refinance the loan at any time paying him off in full down the road before he'd like you to. 

Whether it be blogging on a regular basis, cold calling, and/or preparing an array of marketing materials, staying on-top of these task and maintaining high output is vital for a few obvious reasons.

Hey Eric,If you've bought the property and already have a trusted tenant-in-waiting, plus a year-long lease agreement prepared, that's the B and one of the big Rs taken care of.

@Braden Anderson I use street name but also I like to get creative every now and then and use whatever reminds me of the house lol.

As Edward mentioned, it always helps to be aggressive and creative!

I have been rereading Brandon Turner's book on how to invest with low/no money and I have also been listening to how investors on the podcasts have used creative financing to fund deals.  

Getting prepared ahead of time by shopping around with different maybe local community banks and credit unions for refinance will be something you should be doing ahead of time. 

I would not use my VA loan to try to do any creative financing.

He gave more than 30days, which is great allowing you more time to plan/prepare for next tenant.