With slip fees starting at $140/foot for 6 months, a bit lower during the off-season months, Narragansett Bay is an expensive region for live-aboards. Home prices are also extremely high.
It's also an area with not many "industrial" business opportunities, but if your mechanical skills are diverse, you should find employment; perhaps in one of the electrical utility power plants, at a local commercial shipyard, or in one of the many boat building resourses. They all need skilled mechanics for installing/servicing marine engines.
However, there is a serious shortage of nurses most everywhere, coastal communities included, so your girlfriend will have little difficulty finding job placement. It's the career path my daughter has chosen.
Narragansett Bay is well known as being one of the best sailing areas in the world, with an incomparable quality of life.
True Blue . . .
sold the Nauticat