spending 4k a day to make 4.8k isnt that bad.
I agree its a bit up there, but I know some guys that was spending like 30k a day to make like 31k.
The point is in the profit. If you got 30k a day ( or 4k day ) to float on these buys and your making bank, then I don't see the problem. Some would argue that its a lot to spend to make the $800, but however you gotta hustle is how you gotta hustle.
In reality, your spending 4k to make 4.8k, which is the $800 profit.. but if we assume in some taxes and put you in the highest bracket, then its safe to say about 50% of that is gone for taxes depending on what state you live in and shit.
Bottom line, your making $400 a day which is what some people would kill for in other industries and countries. That's 12k a month which is also 144k a year. You prob wont be running the same campaign in 12 months time, but the fact is your making 3-4x more then the average american and prob. doing jack shit for it ( compared to someone digging ditches, patroling the streets, or cleaning garbage ).
Be happy you can even do it.