We had an expensive highchair loaned by my sister in law, we were using it since the baby could support his head. Then, at about 6 1/2 months we visited my parents and didn't have room in the car. We got the cheapest booster seat style highchair from Argos (about £12) which just straps on to any chair. It is brilliant - there's a tray, it's completely plastic, easy to take apart and clean. Only grouse at the moment is that I can't remove the straps to clean them, but the whole chair fits in the sink anyway so not too difficult... I have just recovered my dining chairs, but we wanted to keep using this chari rather than the expensice one as it was so much easier to use and baby was much closer to sitting at the table with us. So I just split open a bin bag and used masking tape to stick it round the chair, then fitted the bosster chair on top... No problems... So there are ways to save your furniture..