Front Lower Control Arms

[KalahariBX5]

Shop tells me I’m in need of new control arms and wants to replace the entire part on both sides with OEM equipment at around $450 each. Now based on a quick search I’m finding these parts for around $100 a piece.

My question is, is it necessary to replace the whole control arm because of a small amount of play or is it more effective to replace the bushings with something like a polyurethane bushing from Energy suspension?

Q#2. How difficult would it be to perform a bushing replacement in the driveway?

Based on me being the second owner the lower front control arms have never been serviced.

2004 E53 X5 3.0 completely stock.

Thanks in advance