Foundation keys

I have been looking for a few scraps of plywood or metal to hold the rock rubble foundation, while I fill it with rocks now, the other side will fallout if I do not have a brace for when I add on later or next year. I have found some metal and found a few pieces of plywood just today. Now I can get to some serious dirt sifting and add to the rock rubble foundation. I can't help but think this is a lot of work and it is taking a long time. But, when I moved here it was to build a house first and foremost. However, I found a job that has consumed a lot of my time(especially through more education) and I am left wondering if I will have a house this winter, is my job really more important than my having a home, should I quite for a while and finish the house? please feel free to add a comment about this dilemma. Sometimes I am too close to the issue to see it clearly, and could use some advice from my friends. thanks so much.