When to throw in the towel on an older motorhome

I would keep it. Mileage is low. You know what you have. Considering the cost of a new rig I vote to keep it. Many times I have been discouraged from buying a new rig due to all the warranty problems people seem to have with new units. Some buy a new rig and it sits for several weeks awaiting service. No thanks. Just my take on this. Go camping and forget about it. Take care as things need it. You are money ahead my friend