How old is your 5030? That will be the deciding factor. Don't use biodiesel in the old Ford, as it most likely had rubber hoses. The newer fuel hoses are nitrile (I believe) and are resistant to the biodiesel.
If your 5030 owners manual says you can use B5, then the hoses are fine, and you could theoretically run 100% biodiesel with no issues. The reason the engine manufacturers are only approving B5 is (1) the potential variations in biodiesel quality, and (2) the manufacturers may not have had the chance to test higher percentages of biodiesel, though I believe most of them have tested all the way up to B100.
For example, Case IH, being a big farm machinery company, is really promoting biodiesel use in their equipment, but they are the only ones at this point promoting up to 100% biodiesel in at least some of their equipment.
Be sure the biodiesel fuel you are considering meets the ASTM D6751 biodiesel standard. There are many "backyard brewers" out there selling to independent fuel stations. Chances are, the supplier to the station you refer to, is a bigger supplier if they are able to offer 5 different blends, and is offering a good quality fuel, but the key is that it meets the ASTM standard.
If I could get biodiesel at a reasonable price, I'd run B100 in the summer and
B20 in the winter in both my tractor and my truck. I've run it in my previous tractor, and ran it for 18 months in my Powerstroke a few years back and loved it. Unfortunately, the greedy Biodiesel manufacturer raised their prices into the stratosphere, and I refuse to pay $5.75 a gallon for
B20 & $6 for B100 - $4.50 for regular diesel is bad enough as it is.