I totally get that you're getting quotes from professionals and thinking "that is more than I've ever spent on photos in my whole life, like added together"
I'm sure your friend has a nice camera, and heck they maybe even take really nice photos. My first question for you is have they ever shot a wedding before? Yes? Cool. How did you like the photos from the wedding?
Second, how long did they need for the family shots during cocktail hour? Can they command the attention of a group, can they also be discrete? Are they fast? Have you had them do engagement photos for you? Because if they aren't fast, people get bored easy and if they can't command attention then people won't listen when they are asked to move around and are directed.
Lastly, will you be heartbroken if your memories aren't captured? When the photo of your grandma doesn't happen? How about when people aren't staged right? Or when they don't figure out how to compensate for bad lighting, or you get less time with your guests because they take too long with your photos. Just some thoughts for you to think about.
Don't get me wrong everyone needs to start somewhere. Heck, I did friends weddings to start with, and they would say I did a good job. Your friend might be the same and just needs a break into the wedding industry. As your planner it is my job to tell you to think about these things so you know what you're signing off on.
Please note this is my iPhone shot of a PRO at work!