Today, two things have become more popular, that will save a considerable amount.

If you have a limited budget, don't try to build the most popular body style. See what is available, that will give you a similar body style, without the cost that is driven up by popularity.

Buy a good running car, and pirate everything useable out of it.....engine, trans, rear, battery, radiator, alternator, wiring, pedals, driveshaft, lights (if useable), and so on. Just the cost of trying to put all rebuilt or new parts in a car can be high. Don't rebuild the parts is they are functioning okay.

Things like paint, mag wheels, new tires, and upholstering can wait until later, and are not necessary to get the car up and running.