Actually you are not correct on the health insurance part. The answer is: It depends. In my state (NV) it is impossible to buy a private health insurance plan outside of the Obamacare exchanges. I have looked. The companies simply don't offer those products, and refer you to the exchange to buy plans. Many other states are similar. I am certain there may be some states where you can buy a private health insurance plan.
As far as putting your spouse on the payroll, it will be a net savings. The employer 401K match can be 25% of the employee's salary. So if you pay them $36,000 per year, your payroll tax on that will be about $4320 in payroll tax. You can contributes $9,000 out of the S-corp gross receipts to that employee's 401K, which if otherwise paid as salary (or distribution) you would pay $40% or $3600. When you add in the employee contribution, which can be as much as $18,000 which can save you $7200 on net taxes. So paying your spouse could potentially save you ~$3,000 in net income, but only if you use the 401k contribution rules.