Get another job. The offer above looks great, but you have health issues you are trying to get cleared up. You will not be approved by underwriting to obtain a health insurance on your own because you have to disclose your issues. Individual policies are for healthy people. If you have pre-ex, you will either have your pre-ex excluded or they will deny you completely. If you lie on your application, get treated, and they file the claim, it will be denied, the policy will be canceled and you will be in worse shape than you are now.
Get a real job. The one you have speaks of no promise for the future or for offering insurance. Small employers cannot afford to insure you. If they do get a policy, it probably won't have the best of benefits anyway because the cheaper the policy, the less it covers.
Hope this helps
Licensed Insurance Producer