SVO vs SVO generated electric tractor?

a question i am considering a natural farm i have my eye on a 30 acre parcel on which will be a ICF house with extra 2-3 inch ext insulation PV integrated roof and a large vertical drain back system. planting 1/3 winter sown camelina(selling as much as possible at increased $ than fuel) with post harvest millet and local heritage corn. 1/3 people etc food and 1/3 graising dexters goats chicken muscovs turkey pig  and rotating yearly adjusted as needed...
when i started thinking... is it more efficient to generate  power from SVO(/wvo) simple lister clone perhaps to power a electric tractor or run a tractor direct off SVO. this shall be the only consideration in the analysis i like the electric but

there are pros and cons to each those really arent in the thought

Question for us noobs:

What's SVO?

Hi, It would be far more efficient to run the tractor directly with SVO, But you will have to find enough room for the heat exchanger and extra insulation for the fuel tank. A lot depends on the size and style of tractor. Actually, I would convert tractor and generator and do a co-gen for power and hot water!

straight vegetable oil or PPO pure plant oil for the europeans as SVO cant really be used in winter(winter seeding and snow blowing/plowing) in maine really that i know although perhaps if i kept it inside and had some means to keep it warm as its running this is a problem too with batteries as it will have to be kept inside and perhaps a warming matt to keep it the battery pack relatively warm .

IF you have a heated (or warmish) garage, the SVO should go straight into the tractor.  You could run a generator off the PTO and skip converting a separate generator.  Cold may not be good for SVO, but it is murder on batteries, and you would consume double the power to keep the batts warm. 
Running a genny to charge batteries works like this ~35% efficiency to produce the power, lose another 10% storing in the batteries, and another 10% converting back.  If you don't use the tractor for a month, subtract another 2-3% for self-discharge.
I don't know how much Veggie oil you have access to, but using it directly sounds way better to me!  You could just carry a spare can of oil with you into the field, and run the tractor all day long, but your batteries won't give you that.