Those closest to you quite often don't like change especially in someone they care about. It's very common to, at first, have the worst reactions from them.
My daughter didn't want me to do it last time, but I did and she saw that I didn't grow horns, turn green or, heaven forbid, become smaller than she was!! Now this is my secaond time doing LL because I know it's the best diet out there and, again, yesterday my daughter wanted to know exactly how much I was planning on losing, was I sure I was doing the right thing etc. I just told I her I was doing this for me, not her, and she would have to get used to whatever I decided to do with it.
She is 20 years old by the way and, of course, I'm not allowed to have an opinion on anything she does.
The money issue, sit down and write everything down that you can remember eating, drinking, snacking and going out for over last week or an average week. I bet the cost will knock your socks off. And Jim's idea of saving the differance is fantastic, you are going to need all the money you can get your hands on for all those lovely new clothes soon anyway.
