50% return that's a lot for me. normal business return is way less than that. Time in line is something cost free for me since i am doing it myself.
you are risking $1000, to possibly make back $500, that is not good, you have better odds playing roulette on a french wheel and betting on red and black. at least there it's even money
as cost of time, it is not free, everything has a price, there is opportunity cost. if the time you are waiting you can be doing something else so it costs you something, typically you calculate your time based on your hourly wage. time is probably the most valuable commodity.
but good luck to you if you want to risk it, but you asked for opinions and i think the overwhelming one so far is that it is not worth the risk at all