If I was face with that i would rehome and consider replacing them another time when life gives more time. Main reasons, passing your hobby on to someone else isnt going to give them the attention they need, any small problems could end being big ones as no one would be around to notice. i used to have a very large koi pond when I was much younger. it was at my mums house and i was leaving home. some of the fish where over 24" so worth a fair amount of cash, in total 12 very nice fish. mum and brother said they would care for them, so I let them only to receive a phone call to say they had all died cos the filter stopped. no one notice. its a very hard choice to make but the fish should come 1st. that said how keen is your buddie on taking care of them?