Complex sentence: The boat was kept at several different places around the town until a boathouse was built in 1856, for £88, by the RNLI (as the Institution was now known), at what is now the entrance to the railway station.
Split into simpler sentences: The boat was kept at several different places around the town until a boathouse was built in 1856, for £88, by the RNLI (as the Institution was now known). The boathouse cost £88 and was at what is now the entrance to the railway station.