Hello, Tanumoy. I agree with Brandon that it's a weird sentence but that it means the woman is skilled at saving money. He did a very good job at explaining the text, I just wanted to add a bit more for context.
When the author says "many a roble from dissipating itself in tips in some Moscow hotel", the author means another person would have spent the money on tipping service workers at a hotel (in Moscow). However, this woman saves that money. This is just a guess, but the woman in the text might be quit miserly or stingy with her money.
Is this text from Mrs. Packletide’s Tiger?