Good luck Jo, do you not think you can stick it out any longer?
I know what you are going through, we almost threw the whole thing in too (a couple of years ago) and thought about just selling everything up and buying established, but in the end we knew that this was really our dream and we wouldn't be happy anywhere else.
But only you can decide this, it just seems a shame to give up when you are so close to starting, but then again how many stuff ups do you have to put up with.