Silas Marner was a man of stable finances. When in Chapter I we find out that he had once been engaged to be married, we also see that he and his promised Sarah had been saving money together to establish a home. He obviously was no spendthrift if that was the case, and he also seems like a man who needs very little (at the beginning of the story) to be bothered with financial troubles.
After he established his weaving work at Raveloe, we know that he was paid beforehand and many times he was paid in gold, like in the case of Mrs. Osgood's table-linen. In fact, earlier in the story when he cures Sally from the dropsy and heart-failure illness that she was feeling he rejected the many instances where people from town would offer him as much as pieces of silver to get a cure for a loved one.
Hence, we can declare that Silas Marner is at first introduced to us as a man who has enough money and little need. He also has the capacity of making as much money as he wants and it seems that he will surely put that ability into practice soon.