Return Favor for Dad Adopting me

For anyone who knows me, knows my past wasn't easy. When I was younger, my father was abusive and hurt me and my mom too many times to count. When I was 3 a great guy walked into my life and adopted me and repaired my mother and I's hearts and for that, I am forever thankful. Without him, I'm not so sure that my mother and I would have all that we have today. A dream of my Fathers has always been to live on a lake, and I want to do everything I can to make that reality, because if it wasnt for him, who knows if I would've even had a house over my head while I was younger. I know this is asking a lot, but as a 19 year old, helping them purchase a house is hard, and I want to see them happy in a place why they're still young enough to enjoy it! All donations will be given to my mother and adopted father directly, and I'm hoping to warm their hearts on christmas day, or later if needed. Parents need to be appreciated more than they are, and I'm hoping that I can make their wish come true...
thank you so much