i think the best way to answer your question is with a question..how much time do you want to spend? the wmo needs you to build a good filter setup... which if done right it doesnt involve a lot of time... the wvo/svo is the same + you have to build/buy the "on board" system... bio reqiures an actual processor along with some way to filter the oil.. the bio will reqiure the most hands ontime and is cheaper than wvo/svo up front if you build your own processor.. the guys we sell our excess oil to run svo systems all they do is filter it andpour it into the on board system...i make bio..my hands on time perbatch is 45min-1hr (this includes filtering) + the oil collection time.. my investor brings me all myoil in the 5 gal cubbies i.e. no time spent collecting oil.. i also drive 6 miles each way to work,thewife is the same mileage.. i dont think svo would work for me due to lack of time to heat up andthen to purge/stop it..  hope this helps 
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2000 X ,4x4, DIY TYMAR, WALKER BTM, HYPERTECH LEVEL3, AIRDOG 100,
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