Possibly you could get both (Personal and Business) Premier versions of the card.
That is a LOT of spending to put on Southwest Visa, a mediocre card, for the bonus Tier points. I would look to Starwood and cards like Amex Plat (250000 business offers out there) and Chase Ink (100k offer and 5 points on some spend). Or even a 2% cashback card.
A-List/Preferred is just not that enticing to reach for.