moving in

yesterday me and my boyfriend were talking and he said that his dad said we could build a house in the backyard or buy a trailer and keep it there (they would hook up water and electricity, etc) and he told me that i should take the money i’ve been saving up for my school trip to Europe and go half on the house with him. i’m 16 and he’s 17 so he’s graduating this year and getting a full time job this summer. i have a part time job where i make more than minimum wage. We have also been dating for over 2 years but when he asked me this i got really nervous and i’m thinking about waiting till after i graduate myself. Do you guys think this is a good idea?

UPDATE

yes my living situation is safe. We have a lot of people living in our small house which gets annoying but i can live with. We had our first meeting for Europe and i decided that is the best option for me. Thank you everyone for your options!!!