That's my thought/recommendation too... Build planes YOU are interested in building, as you approach completion advertise it for sale. Maybe stop construction when you are ready to start covering. This serves three purposes. 1. You avoid some hanger rash. 2. You can then offer to sell the plane covered as the buyer wishes. 3. If the buyer wants to see the plane, they can see how it's constructed. Nothing hiding under coverings.

Again as I said in an earlier post. Pick planes that are somewhat popular, so that other flyers will have heard about them. Say you build "A Flying Whizbee." A Flying Whizbee might be the best airplane designed since the Wright Flyer, but if you're the only one that knows about it, knows what it can do, you're going to be the only one who will want it. You've got to choose airplanes that are common enough that other people know about them. But also, the plane needs to be rare enough that an ARF doesn't already exist for it. If other people know about them they may want them. If other people don't know about a plane, they definitely WON'T want it.

Maybe choose an airplane that a kit used to exist, but is hard to come by now. Example, Sterling's larger Stearman. When a kit for one of these comes onto ebay.. look at the price! Or choose an airplane in a size that isn't available. A .60 size Pitts Special (assuming one doesn't already exists that is....) I hope that makes sense....