I have always been very anti these so am looking for some advice for a friend as I am not really up on them.They are living here but are canadian.His job has 6 yrs before he has achieved the qualifications he wants then they are going back to canada.They want to buy and are going interest only as they say they know they are not going to be here 25 yrs so are looking for low outgoings now.They have a big deposit more than half i think so they plan to pay back when they sell and think they will be no worse off and may have made a little.The monthly payments are about half their rent.My concern is -ve equity but they firmly believe prices are going up again(as does their broker)Does anyone really have interest only and not worry about how they will pay it all back?