Rhode Island has a cost of living index of 107 relative to the US average of 100. This is close to the national average. Rhode Island offers a typical cost structure — housing and expenses track closely to US median.
The 4% safe withdrawal rule suggests a FIRE number of 25x annual expenses. At Rhode Island's median income of $71,200, that is $1,780,000. However, if you plan to spend more (or less) than median income in retirement, scale the number accordingly.
Rhode Island taxes income at 3.75%–5.99%. In FIRE, your primary income comes from portfolio withdrawals, dividends, and capital gains. Long-term capital gains in RI are taxed at the same rate as ordinary income, including IRA withdrawals. Factor this into your withdrawal rate planning.