Can I wait to take my GRE until after my bachelors, thus delaying my application dates for graduate school
You can only do what you can do. The timing of your future education is less important (my view) than that you make a plan to get there. 

Make a list of your options. For each option list its advantages and disadvantages. Prioritize them. Don't neglect your family's needs in the list of priorities. 

Choose one that has a reasonable path and chance of success. It needn't be the optimal solution. It needs to be a workable solution.