Just my two cents...

I've been running on a mix of 90% WVO/10% diesel in my front tank and using pure diesel in my back tank to start and shutdown with.

I get the oil from a chinese place, filter it through several layers of landscaping cloth in 5-gallon buckets and then simply pour it in the front tank.

I have no modifications to my truck in anyway, no heaters or gadgets.

And believe me I am putting like 1,000 miles or more per week on this truck with relatively few problems other than the fact it was severely neglected in it's former life as a tool truck for a lumber company.

It literally still has several pounds of red clay in the engine bay and all around the tranny, frame, everywhere.
the dirt has become like concrete and I have been slowly trying to remove it but water-washing/spraying does very little to get it off.

I do plan to add a homemade tank heater and oil pre-heater setup using the engine coolant and probably some kind of small tranny/oil cooler attached to the tank with a cover over it, etc.

Anyway, my point being that it is possible to run on WVO without all that expensive equipment.

I only have $1,100 invested in this truck so if it goes then I have already anticipated that as the whole project was to find a diesel for around a $1,000 and run it on WVO.
Success was hoped but never a parameter- therefore I have lost nothing as the truck has already paid for itself both in the work it has done for me and the savings of probably hundreds of dollars in fuel by using WVO!

However, my truck is also a non-turbo IDI 7.3L and seems better built for WVO than others or many of the newer ones...