wow, that food looks amazing!
I read some of the old thread, but not all, but as someone in the business it looks like you need to learn some basic restaurant math tricks. Take the cost of ingredients in a dish and multiply by 4, that's what the dish should cost (I'm accounting for waste and spoilage, for those of you who might take umbrage, but you know damn well that $8 for all that ceviche, it was running at a loss). Take your monthly rent and multiply it by 16, that's the number you need to gross in sales per month at minimum.
I talk a good game about doing it for love, but the truth is you have to hit your numbers because you're not running a charity. You can call the SBA and get a business mentor to help you put together a business plan for free. I've never done it, but I learned these tricks a long time ago and spent my entire adult life in the business. And I have 3 profitable mom & pop's under my belt.
Secondly, location, location, location. I didn't know there was a sizable Peruvian population in Chicago, but is it enough to support your business? My recipe is to look for ridiculously cheap rent and neighbors that don't cook every meal for themselves. Other folks look at density, car and foot traffic, etc
Thirdly, plan time for yourself. Plan to hire employees, learn how to manage them, and don't rely on just one or two exclusively. When they leave for whatever reason it can put a big crimp in operations, have a back up plan, even if it's just yourself.
Fourthly, don't take on partners w/o clearly defined roles and responsibilities.
Fifthly, just don't take on partners, employees are cheaper and less headache and heartache.
Business partnerships can be worse than marriage and divorce.
Best of luck, it appears you have the food part down pat, so the hard part's done.