Could have been. Depends on your VoA at that point. At 20k, an item with an average of 15 adventures would break zero and start being profitable at 1334 VoA. To be considered the best, you'd probably need to have set your VoA around 3000. That would present a profit of 25k for that inebriety, with a profit of 12.5k per inebriety. Anything higher than that and it simply gets more tempting and a better choice.
As a comparison, SHC drink Mae West is 2950 for 16 adventures at 4 inebriety. That means with the same 3000 VoA, you'd have a profit per inebriety of about 11.26k.
Now, at lower VoA levels, you'll end up with the SHC drinks, since it's not worth spending 20k to get less adventures... take a 2k VoA instead of 3k. Total blanket profit 10k, 5k per inebriety. SHC total profit 29.05k, 7.26k per inebriety. And since individual item budget is at 5k, you can easily buy 3k value items.
Just another reason why accurate VoA is important.
Edit: I do see a misconception in what you said above. Budget is not your total budget... it's the maximum that you're willing to spend on any single item, owned or not. A 100k budget means that you'd be willing to spend 100k for one item, not 100k total. If you have 15 food items, 19 drink items, and 15 spleen items, 3 types of chocolate, and overdrinking another item, a budget of 100k means potentially spending up to 5.3 million meat per day. Since you've dropped your budget to 5k, blankets will be eliminated because they cost more than that. But so might lasagna and other good food, depending on market swing.