Brazilian giants. L. parahybana, the salmon pink birdeater, reaches eight or nine inches and produces egg sacs with well over a thousand eggs, which is the entire reason it is one of the least expensive large tarantulas in the world.
That supply glut is worth understanding. One successful female floods a regional market. Prices on slings are near the floor for anything this size, and they stay there because production capacity vastly exceeds demand. If you want a genuinely large tarantula on a small budget, this is the answer and it has been the answer for twenty years.
They grow fast, eat constantly, and kick urticating hairs with enthusiasm. Not a beginner spider despite the price, mostly because an eight-inch animal with a hair-flicking reflex is a different rehousing problem than a four-inch one.