[Doc Weaver]

Well here is where I am:
The tank is trash! after they cleaned it and checked it, there are visible holes all over it, and you can now see multiple patches from before I owned the truck.

Cleveland Tank (here in Ohio) has a steel tank that they built for $700.
I found used tanks for about $500.
Alumi-tank has cylindrical, aluminum for $940 (by time you add straps). They are checking to see if they have a square tank, so I wouldn't need to buy straps and hangers.
Freightliner is on drugs $1200.

Everyone is telling me the low sulfur fuel is eating up steel tanks. There are products out there that claim to coat the inside of the tank and retard the fuel problem.

I'm asking for everyone's help. What would you do in my position?

Thanks,
Doc Weaver