Based on those numbers, yes CoC return is "accurate" but I wouldn't say it's "reasonable"...in fact, it seems VERY high.

Not that it means much from me, but I speak truth! 

If you need it to be an all-cash investment, how much cash are you willing to put into a deal?

I would recommend hiring an accountant to do an evaluation of the business.

Is it advisable to do it with no money out of pocket?

I am new to real estate investing and am on the verge of getting my 1st property underway; it's so close I can taste it! 

It is November 25th and there is only about 35 days left in the year with a lot of professionals who take off the last week of the year.Given that information, you will likely need to buy a poperty with a quick close to achieve what you are looking to do.

With my mortgage eating half of my income, it sounds crazy to take a second one. 

Aha it seems like every time I sell one of mine its the time.

Aha yeah I dont really trust flippers to do the repairs correctly - Even with my own flip I was tempted to cheap out on it but you always pay for it in the end!