For a sister and below about $1 million the NJ inheritance tax is roughly 11% , if a bit over simplified.
Is the inheritance by will or by deer/title?
Fees vary and sometimes the costs are in the "extra's" --so be sure toask.
Will sis take title and use the home or merely sell it...think thru costs of multiple transfers
Who is to be executor--executor makes the call as to whom to hire.
Not a heck of a lot of wiggle room after the fact as to estate taxes and values --unless the home is to be used as primary residence for 2 + years in which case it may be useful to return the home at it lowest defensible valuation.
Personal property is rarely worth on market what you think it is worth.