I have noticed as my wife and I have gotten more successful that friends have expressed less interest in seeing us, talking to us, etc.

Can I purchase the property and give him notice (90 days) to move out OR do I have to honor his current agreement and wait until his lease is up next August?

In low priced REO sales, I have noticed selling agents don't really care to show them.

I’m looking to invest out-of-state from California (I always say that the sunshine is great but our property values are not) and the potential returns in Jackson really caught my interest.I noticed that the best returns are in South and West Jackson, but I haven’t been able to find a property manager who manages in these areas.

You'll also want to ensure you have a good property manager to look after the upkeep of the property if you are not there to notice anything deteriorating or which may need attention.Creating an LLC in California would cost you a minimum tax of $800 every year.

The lease ends on 9/14/18 and a 60 day written notice is required in order to exit the agreement, per the lease.

I received a notice from IRS regarding tax year 2016, they are asking for over $30K adjustment. 

She has 4 children, single mother, so we said as long as you pay rent, you can continue month to month until you find a place or we need to give you a 30 day notice.  

These are basically deeds that state who the property will pass to upon the death of the owner.But in answering your question when there's a spouse living in the subject property (they may have held title as Joint Tenants) re-check the Notice of Petition and if there are other heirs/beneficiary's send your letter to them regarding the property.It's sort of like going through the back door if you will.

This way, if your roommate is not a good match for you, but they're doing nothing that violates your lease, you can just give them the 30 (or 60 day if that's what your location requires) notice to vacate immediately.