A true outdoor TV needs to be built for the elements so you aren't replacing it after one rainy season. Look for one with a high IP rating, which tells you how well the casing blocks water and dust.
Wait until January to buy. Retailers drop prices on last year’s models during Super Bowl sales to clear shelf space for the new tech cycle. You get the same quality for a fraction of the cost.
That 15-month intro window is a deadline, not free money. If you have a balance left over when the 15 months end, the bank will start charging interest on whatever is still owed.