Can't help noting the MPLS location. What kind of financial situation is your Dad in? If he's got the money, Hazelden is only an hour away. My qualifier went there 17 years ago, stayed for 5 months (good thing she had some money!), and has been sober ever since.
Other than that, not much to add except to reiterate that none of this is your fault, and if your Dad drinks on any particular day, it has zero to do with whether you called, went out to lunch, talked nicely, or any of that. Drunks always blame it on us, so they can get us to do what they want (primarily, get off their case so they can be alone with the only one they really love -- that guy or gal named Smirnoff... or Smirnova?).
T