South West London contains very different micro-markets. Two properties within the same postcode can appeal to different tenants and produce different maintenance, liquidity and growth characteristics.
Study the local demand
Consider transport, schools, high streets, green space, property type, lease terms, service charges and the quality of the immediate street. Review achieved rents and sales evidence rather than relying only on asking prices.
A strong investment case should remain credible under more cautious assumptions for costs, voids, finance and exit timing.