Assuming a delaware corp and foreign registration in your home state, just say roughly $1,000-$1,500 if going through an attorney for that part. Stripe has Atlas which I think does most of that for $500, but I don't think includes some of the state fees, so probably a little more.
The SAFE note, should be able to be taken to an attorney and have needed details filled in and revised based on your specific situation. I would expect that to be less than $2k in general. That would be roughly 6-10 hrs of attorney/paralegal time generally which seems adequate to make modifications.
$15k seems high to me for just incorporating and modifying the SAFE note. However, $15k in legal fees to raise $1M doesn't seem totally out of line. e.g. closing documents, due diligence support etc.
Make sure you know what it is covering and not covering, because that makes a huge difference in whether it is reasonable or not. Also your location makes a huge impact on this as well as the law firms reputation and history of doing this stuff.