Additionally, I am beginning to believe you don't live there to be the "house monitor" as this seems to be going on for a time period. 

It’s inexpensive to provide but can make a big impact.Comfortable Bedding: Investing in high-quality mattresses, pillows, and linens improves the guest experience and leads to better reviews, which can boost occupancy rates.Smart TV or Streaming Services: Offering Netflix, Hulu, or similar services is a low-cost way to enhance guest entertainment and stay competitive.Fully Stocked Kitchen: A well-equipped kitchen with basic appliances and utensils appeals to families and long-term guests, saving them money on dining out.Dedicated Workspace: If your property caters to remote workers, adding a small desk and ergonomic chair can set your listing apart.Outdoor Spaces: If your property allows, an outdoor seating area, fire pit, or hot tub can significantly increase your nightly rate and attract more bookings.Energy-Efficient Features: Guests appreciate eco-friendly options like LED lighting, smart thermostats, or solar panels, especially in eco-conscious markets.Keyless Entry: A smart lock is a relatively small investment but offers convenience and security, which many guests value.If you’re deciding on amenities to add, it’s always a good idea to research your local market.

In southern CA, even garage conversion ADU additions are typically costing more than the value added.  

Additionally, confirm the transfer won’t lead to property reassessment, which could increase taxes.

If any damage arises from her negligence she will be getting the bills for damages, plus costs of collecting which you bill as well as your attorney in addition to the termination of her lease.

I don't think we will be able to afford a 1.5M+ mortgage without a huge down payment (sale of our house).I feel this would be going backwards as we would focus on one property preventing us to do other things.

Quote from @Nick Am: @Michael Plaks--> The SE taxes are STRICTLY NOT in addition. 

Are there any additional considerations?

Additionally, please share if this was a scam or not.

Additionally, many deals tend to fly under the radar, so networking within organizations like NARPM (National Association of Residential Property Managers) can help uncover opportunities.If anyone reading this is considering selling their property management company in Texas, feel free to share—I’m genuinely interested in connecting.