I have roughly 2mil to spend, and am looking for the best possible unlimited use healing item and the best unlimited use weapon possible, based on my budget. THANK YOU!

Malevolent Grimfruit (heals 50) is a good healer and does decent damage for a beginner weapon. Champion Scroll (heals 15) might also be a good investment (you might want to create one instead of buying one though. the price is still inflated because of the plot that just finished).

Malevolent is def your best investment for unlimited healing