However, if they have not and if they're willing to exercise a little patience then they have an excellent opportunity using a combination of sec 121 primary residence exclusion, 1031 tax deferred exchange, and installment sale rules to accomplish the following:1.

The statement shall be filed not later than February 15 of each year, except that a limited liability company formed after September 30 or a foreign limited liability company authorized to transact business in this state after September 30 need not file a statement on the February 15 immediately succeeding its formation or authorization. (4) If a limited liability company fails to appoint or maintain an agent for service of process, or the agent for service of process cannot be found or served through the exercise of reasonable diligence, service of process may be made by delivering or mailing by registered mail to the administrator a summons and copy of the complaint.

Pre adjust the option price to anticipate that if they exercised the option they got credit and if they rented for x period of time they got a discount. 

In the end, nothing changes until you eat healthy and exercise.

I went through this exercise after taking a mini MBA program at Stanford before I landed a role at Google. 

Tenants can exercise their rights and find themselves in eviction court. 

Lease to own makes sense:   higher down payment deposit non refundable, tenant is responsible for fixings, tenant takes better care of place, tenant only exercises half the time, you can raise monthly payments a little higher...Id like to use this strategy going forward....but I never heard that eviction is completely different, between weeks and years.Would you share a contractual way to avoid this lengthy and costly  eviction, and further experience.

Being that this is your first accepted offer, you could maybe use this an an exercise to get familiar with tenant screening as well.3) If you're not under contract yet, you typically don't begin to schedule inspection...

@Daniel Weber I am trying to see if I can place a bathroom and exercise room in the basement of a 3 family house, I wanted to find the code that regulates that thanks

In the end since this is the internet and I am not wasting someones money by  getting into nuance they don't want to pay for I find it to be a great brain exercise.