More or less, your employees are also employees of the leasing firm, and that firm has access to employer paid health plans from well known vendor. I think you select from a large menu of options (including employer/employee split) to make a small menu for your employees. TriNet also did payroll, AFAIK. I'm sure there are other options, but as an employee the presented menu was very similar to what I saw at Facebook and Yahoo.
Basically your employees buy their own insurance plans and submit for reimbursement up to a specified dollar amount. They can also be reimbursed for other qualified medical expenses in addition to health insurance premiums.
Using this program the employees do not qualify for healthcare subsidy.
We tried to do a traditional group plan initially, but didn’t have enough employees in a single state to qualify.
https://www.healthcare.gov/small-businesses/learn-more/qsehr...
I do have private health insurance now with Bupa but it's less than $100 per month.