Have you ever been on the road full time? 8 years here ...it sucks.
Being gone is no picnic for all concerned ie., your family mostly.
If they say up to 3 nights a week plan on 4 nights a week more often than not.
Just because you have a credit card does not mean it has no limits .They will tell you 'suggest' were to stay. How much they will allow for meals and "by the way you went way over the minutes alowed on your cell phone.
Ask yourself this .."If its such a great job..why did the last guy leave?
If you need to sell to stay alive in this economy now is not a good time for "on the job training ,and remember "last guy hired usually first guy fired."
And you say 50 hours possible..Who sets the weeks itinerary? I bet it will be a full 50 plus if the manager does it .
Also i bet the job isnt "straight salary" so you more than likely will owe them your soul before you find it wont pay ..but then you might just have the best damn job offer ever!