This is an old thread that was revived with the recent reply, and re-reading it now, I want to correct a couple things. What I said in an earlier comment about "section 179 can't be used to create a business loss", that wasn't entirely accurate/complete. The loss created by section 179 is limited to your total net taxable income amount from all "active" business income you have, plus any W-2 income. So you can have section 179 losses for your rental even if the rental isn't generating positive taxable income, as long as you have other active income. Note that active income isn't the same thing as non-passive income, it's lower bar that just requires that it's a business activity that isn't just entirely passive. But the rental too does have to meet the "active conduct of a trade or business" threshold, which does mean you wouldn't qualify to use section 179 if you have a rental that is managed entirely by someone else and you aren't at least overseeing it and making decisions about the management of it.
I mostly disagree with the reply suggesting that you need to have an LLC to take the section 179 deduction. An LLC is potentially one minor factor that might contribute to the evidence that you are running your rental activity as a trade or business, but it's definitely not required that you have an LLC to qualify. That comment also seemed to imply that you don't report the rental on Schedule E if you have an LLC, but that's not correct, with a single member LLC it still goes on Schedule E.
"I use a schedule E and do not have an LLC or business name, so can I purchase the vehicle under my personal name and take section 179? The vehicle is over 6000 pounds GVWR and will be used nearly entirely for business (going to current rental and searching for new properties to acquire)."
It's fine that it's on schedule E and not in an LLC. The are some specific limitations on SUVs and crossovers even if they're over 6000 pounds, so you should make sure the particular vehicle qualifies.
"A second question is if I finance the car purchase can I also deduct the business use portion of the interest charged on the loan?"
Yes, you can deduct related expenses including gas, loan interest, insurance, etc. using the actual vehicle expenses method to deduct auto expenses for your rental or other businesses.