How is it my fault that I started a dog walking business, made $800 a day.. But the business failed because of unworkable working conditions?

I flat out don't believe this.  You were making $800 a day walking dogs in Fayetteville, AND you work at McDonalds AND you are the head chef at a hospital?  Sorry, Patrick/Ace, not believable.  Does Chelcee believe any of your nonsense?

Because you should have anticipated the conditions in which your business would operate. 

I don't believe you made $800 a day.

Even if you charged $80 for an overnight...

That would be about 48 dog walks in a day = at 20minutes a piece plus travel time, that would be over 20 hours and if you were working 20 hours, you wouldn't have done the overnight.

If the business was yours, surely the unworkable conditions were also your responsibility.

So you started a business without considering all the factors involved. Surely you knew about the neighborhoods you would be walking dogs in, your failure to consider the people and potential risks in those areas is nobody’s fault but your own. Same thing with dog breeds. You certainly could have said that your business only handles breeds not on the dangerous breed list, like many insurance companies do. If you didn’t have enough of a client base without including dangerous breeds, then your business plan wasn’t well thought out for the areas you intended to service.

Poor research and planning isn’t anybody’s fault but your own.

It is not your fault. The working conditions became unworkable.

It's your fault because you failed to take the conditions into consideration when you started your business.