Hi there Sgt,
I'm not sure I know what you mean by 'expensive'.
One or two of the guys have already touched on the costs but......
If you shop around carefully (ebay, websites, shows etc) you will find there's LOADS of good quality kits out there which will not cost a fortune. You may not get the latest all-singing, all-dancing kits from the best manufacturers but that still leaves you an amazing choice.
There's equally lots of choice for cheaper materials such as paints, adhesives and tools from similar sources. Even though you will need lots of extra bits, if you buy them as needed in small lots, the total cost can be spread over quite a long time. Once bought, you will be able to spread the cost over the (hopefully) many, many kits you will build using them.
However that's all about reducing the actual financial cost of your modelling. What about the benefits?
Let's say you spend £20 on a kit and another £10 on all the bits of paint, glues etc you need. That gives a total of just £30. Maybe a lot of money to some folks and a minor amount to others. Regardless of the amount, how long are you going to spend on this kit?
Suppose it took you 2 hours to find it and buy it on ebay or wherever you looked. You may spend some time looking at build reviews before you buy and maybe research a particular version. That can take ages or no time at all if you just want a generic version of your kit. Let's say it averages out at about 2 hours.
So far you've occupied yourself for 4 hours and you haven't even got the box yet! Assuming you count all this time as part of your 'modelling' hobby. I do; and I'd guess there's lots of others who look at all the research, buying, learning etc as part of the hobby.
If you're like me, when you finally get the kit, you'll spend at least 1 hour just checking through the instructions sorting out the build/paint sequence and colours/markings. This could be a lot more depending on the kit and what you want from it.
Let's assume you spend 20 hours actually assembling it, 3 hours painting, 1 hour for decals and 1 hour for weathering etc. (Again, some of these will be conservative depending on the kit).
Where have we got to? That's a total of 30 hours at a cost of £30. What a coincidence! (OK. I haven't included the space you need, or the internet cost etc. etc. But you got those anyway. If you don't use them for this hobby, you'll use them for something else). So your missus says: "But you spent £80 on the last Tamigawa!" Spending that much means you'll be spending two or three times longer building it to get it just perfect.
That means your hobby cost just £1.00 per hour! Mine costs me much less than that as I spend more time doing the other stuff than I do actually building. Then you can spend as long as you like showing off your work to anyone you think might be interested. (No idea how long that would take but think of all the admiration you'll get! Worth a fortune that stuff is!). If you're any good, you could sell your finished kit and get some of your money back. If you're REALLY good, you might even get back more than you paid.
What can you do hobby wise that costs less than that? (You could spend much, much more than this if you went for the top kits with all the aftermarket goodies. Or tried R/C stuff like Skyraider! From what he was saying at Telford, that gets really pricy. But I think my figures would be fairly realistic for most modellers). Even a simple visit to the cinema or pub will cost more than a measly £1 per hour!
You might want to mention these figures to SWMBO. It may help. Failing that, you can always say: "I'm thinking of changing hobbies. Can I have £20000 to buy a car and £300 a week expenses to go rallying? And by the way, that will also mean I'll be away from home most weekends. Will that be OK dear?"
Gern