Hi Fliss
The only advice I would be inclined to give is this.
If your husbands previos modelling has involved building stuff from scratch, and he has easy access to plywood and other timber in his shed already, then a semi-kit would offer you more bang for your buck. This is because he has a lot of the things he needs already.
If he prefers to have everything in the box, so he can just enjoy the building of it, get a full kit.
One more thing. Fittings kits.
Fittings can include the things like hand rails, antenna, life boats, lamps, fog horns, ships wheel, etc to add detail to the kit. Some people like to make thier own fittings, and so fittings kits are an extra.
Some boats come with more than one set of fittings, for example a wood fittings kit and/or a metal fittings kit.
You should consider this when researching and purchasing.
I wish my wife was like you.
