You sound like someone who is responsible with money. I know how it feels to want something and there just is not enough in the savings to swing it. Sometimes you have to separate wants from needs. Working out a monthly budget and putting aside so much every month (like your car stereo) for a big purchase works. I need a new car and find putting back a car payment (around $300) every month adds up fast and soon I'll pay cash for one. Since I don't have a car payment going out now, it's economical to do this. The car will be mine and not the banks. Then all I need to take care of is the maintenance on it. There's something very satisfying about having things that are already paid for and you are the proud owner. Nobody can take it back from you because you are just borrowing it until it becomes yours after paying double or triple for it.
However, to help you establish credit, here are a couple ideas: Save up enough money to buy something and then look for a seller that carries their own financing (like a furniture store). Say you are looking to buy a new bed frame and mattress that cost $1500, and you have saved up $1300. Put down the $1300 on the set, and let the furniture company finance the rest for you. That will establish credit. Make sure to ask if they report to a credit reporting agency. Sometimes if you almost have the purchase price saved up, a bank will extend you the credit on the balance also. They definitely report to a credit reporting agency. That's one way of establishing a little credit along the way to getting more credit. Sometimes businesses will have a financing company they will refer you to when you want to purchase something from them. These finance companies usually charge a high interest rate, but will establish credit under your name. Like I said before, have most of the purchase price already paid down, so the remainder is just to establish monthly payments to get your credit name established. Some won't care about your income if you have most of the price in hand.
You can also establish credit with prepaid credit cards. Some banks will issue credit cards on the savings you have placed with them. You open a savings account linked to a credit card. You cannot charge over the amount you have in the savings and cannot withdraw the savings out. The savings account actually protects the cards borrowing limit. Say you put $250 in a savings backed credit card. The bank will issue a credit card with a $250 limit on it. Get what I'm saying? This establishes credit because you pay the payments to the bank and/or put more in your savings to "up" your spending limit. Paying the card off in monthly payments establishes credit because the bank reports it to the credit reporting agency. A word of caution here: These types of cards usually have high interest rates and annual fees that are astronomical. You can do this to establish credit, then afterward look for a different card with lower interest rates, etc. By that time, your credit has been established and you have some credit worthiness reported under your name.
Stay away from places like "Rent To Own". Which are nothing but a rip off.
Do you know someone who is computer savvy? A friend of mine certainly is and he helps me buy my computers refurbished or almost new. My desktop is a Mac that was bought refurbished and is still going strong after 7 years. My next Mac laptop will be bought refurbished also. I'm Looking to buy one in the next couple months. You can get them so much cheaper than new and they are just like new. However, you do have to pay cash for them and not on credit. You really do need someone who knows what they are looking for and the ins and outs of a computer. There are too many websites out there selling computers and parts that are not reputable.
You almost need to have a credit card to rent a car or reserve a hotel room. You can do it without, but it's a hassle and you may lay down hundreds of dollars in deposits in lieu of a credit card. Everything today in our society is geared towards having credit cards and some people live off of their credit cards in this economy. Not a good thing to do. There is going to come a time to pay the Piper.
Hope this helps a little bit...........