At current exchange rates you're looking at funding of at best 4k USD.
I don't know about Phoenix, but where I live, you don't get that many cars for 4k USD. Imagine you buy a car that you can't get flipped. Your business would be grounded because most of your funds are now immovable.
Next are the management fees. Let's say you buy cars for 4k USD and you're able to flip them with 20% premium within 2 weeks (good job!). That results in a total profit of 800 USD from which you get 160 USD. Extrapolate that to a month and you're looking at less than 400 USD a month. Are you sure you're able to sustain a business with that?
I'm so sorry, I accidently forgot a 0 from the number of shares when I was typing this up last night, it is 100,000 shares not 10,000. You're absolutely correct that 4k USD doesn't get you a lot of car for your money but we currently operate at about the 10k USD level which typically buys you a 2010-14 mid-level sedan such as a Chevy Malibu or Ford Focus that can then in turn be sold at profit from anywhere ranging from 1k to 3k USD. The factors that determine how well we do is the number repairs (typically very little), getting appropriate parts to enhance the value (OEM rugs, rims, replacing damaged parts) and the current market's interest (SUVs naturally do very poorly now but can can be bought cheaply) in the vehicle. As far as sustainability, our overhead is minimal at best. We typically spend very little money going to auction, and since we're allowed access to auctions reserved for dealerships, our competition is much much lower. Craigslist likewise takes little time or effort to utilize while being very very effective.