So decorating your bedroom when you don't have a lot of money to spend, sometimes it's hard. But it also can be really interesting, because it opens up opportunities to introduce different things that normally you wouldn't have thought of. For instance, you don't have to buy all of your bedroom furniture brand new and it doesn't have to be in a set.
You can get things at antique stores, second-hand stores, warehouses, place like Overstock online, they have pieces that were left over that you can also purchase. Sometimes intermixing is really interesting. You don't have to buy a full set. So always remember that when you're shopping. Especially in the summer months, you can get some really great pieces at garage sales.
I'm a big garage sale hunter, so I love garage sales, just for that reason. Also, why do you have to have to just keep a carpet on the floor? If you get a really good deal on a rug and it's thin enough, you can hang it as a tapestry in your room and then that becomes your focal point and it becomes your art work at the same time.
Also with bedding, you don't have to spend a ton of money, you can get maybe 600-700 thread count at the big box stores for like $20-30 versus maybe back in the day, you'd spend $1000 for the same thread count. Now you don't have to do that, because there are tons of stores that offer it at a much less expensive price. So the furniture, the bedding is really important.
Paint is really inexpensive, so for $30 for a can of paint, your bedroom can become an oasis. Just remember the accessories, why does it all have to be expensive? Put a couple pieces here and there and maybe one object that maybe you spent a little bit more money on, and then the other pieces you spent less on. The more expensive piece will elevate the less expensive pieces and it will make your room feel like you spent more money than you actually did.