At 700 mi even with a diesel at 15 mpg that’s what 35ish gallons. At $3.95/4 per gallon you’re looking at Just about $140 or so in fuel plus tolls and someone’s time. With gas you’re likely looking at around 8-9 mpg at $3.40? So that would be what, over $250?
When I do transport I charge in the area of $1.25.mi measured one way. So I would normally get around $400-450 for that trip.
NJ is around a 13-14 hour round trip towing. I’ve done it a few times.
Might not be a bad idea to check into shipping.