Trying to figure out which would be best for my e-commerce business out of an S-Corp and LLC?

"S-corp" is actually a tax designation and not an entity type. Both a corporation and a limited liability company (LLC) may elect to be taxed...

What necessary licensing or other legal documents must I complete or acquire to start an online retail store?

At a minimum, you will need a business license from the city or county where you will be located, depending on whether you are in the city limits...

I have an eviction question.

Yes. You do not have to evict all tenants.

Can a 30 day notice to vacate from landlord be backdated?

It would be from the date you received it or are deemed to have received it per the terms of the lease.

How can my landlord evict us if we are up to date on our rent? Isn't it illegal for 'LL to do so?

The landlord has not evicted you. They filed a dispossessory action, and you have the right to assert a defense to the action and possibly not be...

Am I a tenant-at-will or in an lease extension from an email?

Assuming the lease does not state otherwise, an e-mail can qualify as a writing as long as it is clear it came from the landlord and that it was...

Is there a way to terminate a lease with little or no financial penalties due to health issues?

No, not unless the lease allows it (which would be very unusual) or the landlord consents.

Are we committed to purchasing or the price with the offer? Should we suggest earnest money with terms?

The offer is (or should be) non-binding. So, you would be making the offer based on some assumptions that may or may not turn out to be true,...

Can we still be evicted although it does not say on the original lease that we can or cannot sublease?

If the lease does not restrict you from assigning or subleasing the property (which happens but is less common), then you are free to sublease. ...

No, unless the lease agreement requires it.