You only need to compare the cost of the models to other things you could do with your time, and then your "mrs" can understand what great value these kits are. Even building these kits full time, would probably need at least 3-4 weeks (at my pace) and much longer, say 2-3 months done in spare time. Compare the cost over the same period of time to a few rounds of golf, a couple of evenings in the pub with work colleagues, a trip to a football game etc. Even with paints, accessories etc, this is a relatively cheap hobby!