If you lived in/near Chicago area, I'd have a great sofa to sell you.
I was told Ashley Furniture sells great quality items at an inexpensive price. You could also look on Craigslist, but be careful of the scammers. Do in-person transactions only! Have you ever been to World Market? Great stuff at a low cost.
I think the best places to buy plants are grocery stores and garden stores. Just don't leave the plants in the cheap plastic containers. Either replant them (buy a bag of soil) with some small rocks at the bottom if pot does not have drainage, or make sure the plastic containers can be hidden in new pots. Whatever you do, be sure to remove the plastic flim wrap that many plants come in.