Based upon all of your research, you will find out the following no matter what:

1. Proper WVO preparation will ensure long term, trouble free driving;
2. You have to heat it / ideally thin it (cut it) prior to combustion;
3. The "chemistry" of burning WVO will leave behind some 'junk';
4. It is a calculated risk to burn WVO and the money you save can be applied to your next engine;
5. These are old engines and they have a life span, and whenever they fail, it will because of 'normal' issues or WVO issues (or both)-- see #4 above
6. It involves a certain degree of investment of time and money, and it is a continuing investment throughout your time burning WVO;
7. It is a tradeoff process throughout, that is, your time and money for WVO systems, et cet vs. the ease and money for RUG, #2, et cet.; and,
8. The two-tank system is superior.

Are the trade-offs worth it? Yes, of course up until you decide to quit.

You will read endless comments, articles, threads, and review a ba-zillion pictures. You will see all sorts of countless "tricks" to save money, however, here's another little dirty secret of WVO: It does in fact cost money. You can employ all of your talents, and a ton of time to try to cut or avoid costs, but plan on spending well over $1,000. That's pricing a WVO cleaning system, e.g., centrifuge, motor, et cet. You will need a dedicated refinery space and dedicated storage space (assuming you're burning WVO full-time); plus the pricing for mods and changes to your car (car system); and the biggest cost of all -- your time. Finding WVO can be tough, also.