The biggest and some times most awkward question is How much does a model railway cost?
A model railway essentially can cost as much as you want to spend on it, the average railway modeller will spend around £500 -£1000 a year on their layout. Although most starter sets can be picked up for less than £100.00 locomotives and rolling stock are slowly increasing in price, detailing kits and accessories are generally classed as pocket money prices for a number of kits, but these can range from £5 up to around £30 or even more.
However, you can pick up some great deals, on eBay, Facebook model railway trade groups, and of course at model railway shows.