Has anyone tried this? It looks fantastic, but my wallet will have to recover from the Winter Sales before I give it a go! https://www.simsig.co.uk/
It's a great simulation however the payware can be on the expensive side. There's a number of free simulations such as Exeter, Westbury, Swindon, Oxted etc. I'd suggest giving these a go before buying any Sims.
Played the Southampton one for a while, and it's free. Many of the payware ones are too large and complex unless you get serious about it