I ask this question of myself. We have a 13 year old Monaco Dynasty.
Parts for the chassis are available. The convect microwave quit last winter, so I ordered a new one. Quasar tube TV got ugly. Got a Trav'ler put it on and put in a 32" HD flatscreen. Radio quit, put in a new Sony so all the plugs work. An '05-'07 MH is going to cost ~$50k to upgrade to. The only other MH I would consider is Tradition '12 or later and they are a couple of $100k more. Needing more room might drive this, but MH age probably will not.
I read in a newspaper a financial advisor recommending this, when the cost of repair approaches half the cost of new, it's time to replace. In my instance, I would have to carry a mortgage of about $1000-1200 a month to buy a MH to replace this one. So if the cost of repair approaches $500-600 per month on an annual basis then it is time to move. That is $6k-7k in a year.
IMHO
