To me, it sounbd slike you have to get a bonus of $56 to cover the mileage, plus enough to make it worth your time to spend 2 hours doing this. If I already had other shops, then this could be an add-on at lower bonus. But to take it and then assume that you will get other shops from other MSCs, my advice is to say no. There is no way to deposit "building a relationship" into your bank account. You of course have the right to decide how much you are willing to loose. Offers of "gas money" are silly because the IRS says it costs you $0.56 a mile including gas, oil, depreciation, repairs, etc. If you get 10 miles/gallon (I do hope that you do better than that), then you need to pay for 10 gallons of gas at the current national average of $3.52 = $35.20 and if you really do get only 10 miles per gallon, then I am sure that you are loosing money even at $0.56 per mile.
I often take a job on speculation that I will find other jobs, but not one that is 50 miles away. I suppose I might if I knew the area and had a track record of finding other jobs along the way. For a bonus, I have driven from Pennsylvania through Delaware and then across a $4 toll bridge and then 45 miles into New Jersey to a bank, but it made sense (and cents) to do that. I get 28 - 30 miles/gallon.
Shopping Southeast Pennsylvania, Delaware above the canal, and South Jersey since 2008