Complex sentence: In her late twenties, Garnett was living a turbulent life on a houseboat on the River Thames at Chelsea, which had been bought for her by her parents, the result of combining a high-spending lifestyle with having no income at all.
Split into simpler sentences: In her late twenties, Garnett was living on a houseboat on the River Thames at Chelsea, which had been bought for her by her parents. However, her life was turbulent, the result of combining a high-spending lifestyle with having no income at all.