Subbed in so I know where to find this. Interesting thread!
I know the OP hasnt done all exactly to plan but I think he'll pull it off. Maybe not to a professional finish but hey, he's doing it himself and i think he'll be happy with his own finish. I've seen some horrendous diy tiling and no-one in their house or visitors even notice the difference. As long as the OP is happy, and it's safe to walk on, then that's fine with me. OP, I don't really have advice on how to go about it but all I can say is good luck and I hope you finish it to a finish you and your family are happy with.
As for the critics on here OP, you have to understand they are times served tilers, are excellent at what they do and take pride in their trade. It's to be expected the criticism because of your issues. Hopefully they stick around and help you out of the sticky situation your in at the moment.