Before going to seminary, you and your spouse must agree on the priorities for your family. If both of you agree, your family can draw closer together and closer to the Lord as you gain the valuable tools you will need for the future. Some students with families take a reduced class load and extend their training to reduce academic and financial pressures. While at seminary your spouse must be included in the process. Many seminaries provide ministries to and for spouses to provide a source of fellowship and to equip them better in their ministries.
Some seminaries even allow spouses to audit or enroll in courses at a discount.
This is a difficult question. The cost and time necessary to do well in seminary could suggest that you delay your move to seminary. However, if you and your spouse appear to be facing minimal adjustment to marriage, then the new adventure of seminary might be an exciting and rewarding experience. The key is to determine where and when the Lord desires your training to occur. Each individual couple must determine God's timing.