OMG Leslie...I know how you feel, but understand that if you are getting coolant mixed with your oil, you are driving a ticking time bomb. I didn't have the cash when I changed mine out, but I rationalized that spending the $$ to fix it was cheaper than letting it go and ruining the engine.
I hitched a ride to work with a co-worker and had the kids go to school with a neighbor. As for the money...I didn't pay a couple of bills that month. I figured the utility companies could wait and were cheaper interest than a credit card.