Growling sound that gets louder as I drive faster

All depends on what it is. Does the sound change if you are driving and swerve the steering wheel back and forth? Does it change if you step on the brakes? If you are driving along and push in the clutch does the sound change? How about if you do the same but shift into neutral and coast? Please answer those and we can see if we can narrow down what the issue is.

With a noisy bearing it is hard to tell how long it could last. I have driven on bearings that growled for a long time and also had them not make a sound and tear the steering knuckle off when they failed. If it is a rear bearing it is even harder to say.

Growling is usually a result of internal failure of the bearings themselves. A small piece of the hardened steel flakes off and creates a small pit, as more pits form the growl starts.

As for the cost, it would depend a lot on if you are going to DIY it or if you plan on having a shop do the work.
If it is a front bearing and you were to DIY it the bearing runs about $30.00 for the SKF and you need the ability to press it out and in.
If you have a shop do it the part price will probably double and add about $100.00 for labor.
This will give you an idea of the work involved.
https://www.2carpros.com/articles/bearing-press-how-to-use

If steering and braking have no real effect on the sound it may be a rear bearing instead of a front.

Yeah, that was what I expected when the steering and braking made no difference with the noise. Rear bearings generally do not respond as much as the fronts due to the lack of weight and lower change of angles as the vehicle moves when you turn the wheel.

Glad to hear they found it and thank you for using 2CarPros.