I got a guy at work asking me to do the front LCA's on his '07 Honda Accord. He's gonna get a quote from the shop and have me take a bid on the job if I want it.
Labor guide calls for 1.5 hours on one side and 2.3 for both. Screw that 2.3 price. I would double the 1.5. BUT, you will not be in a shop atmosphere and likely without a lift. If it was me, I would estimate 4 hours total at your labor rate and you should still be less than the shop labor. Is he supplying the parts? If you or the customer gets the parts, you are gonna save $ on parts cost, depending on where you get them and if you get discounts, like I do.
IIRC, the job is pretty easy. Don't have to deal with the strut, just sway bar links and such. If you bid 4 hours labor, you are still gonna save the guy a bunch of labor $.
BUT, if in a salt area and dealing with rust, I always tell people that if the parts come apart ok, then here is my ESTIMATE. If the rust hinders the work, the time may have to be adjusted. You need to allow for cost of penetrant and whatever else you may use during the process.
If you sail right thru the job and feel like it, you can always make him happy and adjust the price down. If he helps, I would not adjust down much.