There are other online brokerages, both large and small, that can help you sort out the individual market health insurance options available in your area. Most of them can show you plans that are available in the exchange as well as options that are only available outside the exchange (no subsidies are available outside the exchange, but as noted above, you're probably not eligible for subsidies anyway, if you have access to an employer-sponsored plan).
But it's also worth noting that if they keep the employer-sponsored plan for the whole family, the premiums will almost certainly be payroll deducted on the pre-tax basis. On the other hand, if they opt to buy an individual market plan, the premiums would only be tax deductible to the extent that they (along with other medical expenses) exceed 10 percent of the family's household income, and assuming that the family opts to itemize their tax deductions (increasingly rare now that the Tax Cuts and Jobs Act has greatly increased the standard deduction).
Depending on the health insurance company, Texas individual and family health insurance rates for couples can be based on the age of the youngest person on the policy. Some couples with an age difference of several years may find they save money by applying for the same plan rather than individually. Couples that are only a few years apart might be able to reduce their total costs by applying for separate health insurance plans. If you decide to apply for a health insurance plan as a couple, make sure the plan you choose covers the benefits both of you need.
But the ACA changed all that. Medical underwriting is no longer used, although applicants can now only enroll during open enrollment or a special enrollment period triggered by a qualifying event (similar to how enrollment works for employer-sponsored plans). Essential health benefits are now covered on all new individual major medical plans in every state. And millions of people are receiving premium subsidies that cover the majority of their premiums for plans purchased in each state’s health insurance exchange (the ACA’s consumer protection reforms apply to plans sold outside the exchanges as well, but the subsidies are only available in the exchange). The ACA also limits the percentage of premiums that insurers can use for administrative costs, including profits and executives’ salaries; insurers have refunded billions of dollars to consumers as a result of the new rules.