I have seen it extended with an LOE - letter of explanation as well.Make sure that you have all of the information on the renters like contact info, length of time renting units, pets, and on the walk through make sure the units are well kept if you plan on keeping renters.

I take great pride in my work, combining quality craftsmanship with innovative design to create kitchens that truly stand out.While I am deeply committed to [Your Company Name], my passion for real estate extends beyond just one room.

The Graham Leach Act defines its scope to extend to protection to individuals as opposed to "financial institutions." 

Know your key dates of everything, contingencies, options to such, and strategize for getting any amendments to extend if need be. 

If the people want to extend after the first year then just do an extension, why lock yourself into 2 years when you don’t know what type of tenant they will be?

You may be able to extend Liability coverage from your homeowners policy (have to add LLC to the homeowners also).  

I'd definitely be interested to hear if any of these add-on platforms have opinions on this specific topic - for example, if the guest purchases an alcoholic add-on through this third-party add-on site, do they have any waiver of liability which extends to cover the host?

This also makes it harder for you to develop a sudden soft spot and let her talk you into extending.

I have been getting requests from guests on VRBO for extended stays  - up to 5 months.

Some of the people may be friends or extended family that is hard for her to control, but she is ultimately responsible for.Would you rent to her again?