If that does not go in my favor I may need to seek legal counsel.

Connie this is not true.. there about 15 states that require state license and NMLS in CA you can do HML with a RE Broker license legally.. 

Last I checked they don't allow ADUs legally that aren't fixed, they want to see foundation for it to be rented out and considered an ADU. 

Even if they do not, it’s not your legal responsibility.Long version: It actually depends on your method of payment, and it’s not always clear.Credit card payments: clearly not you problem, no 1099s needed.Zelle payments: you DO need to send 1099s for Zelle payments.PayPal, Venmo and Cash App payments: this is where it gets tricky.

Weeks later, it was communicated to us that the underwriter wouldn’t accept the ones signed by only one of us – legally binding for LLCs – and required we send amended copies of leases signed by both of us.

i can't legally kick her out, unless she keep paying later after attorney letter, but she stoped after she received the letter

If this is a big-ticket item, you might consider legal action against Airbnb.  

@Tove Fox - Residential Real Estate InvestingPros:Lower Entry Costs: Easier to get started with less capital required.High Demand: People always need homes, making demand relatively stable.Easier Financing: Mortgages are generally easier to secure with favorable terms.Simplicity: Easier to understand and manage, especially for beginners.Flexibility: You can use it as a personal residence or rent it out.Cons:Tenant Turnover: More frequent turnover leads to vacancy and more management.Lower Cash Flow: Income potential can be modest compared to commercial properties.Emotional Buyers: Residential prices can be influenced by emotions, leading to price volatility.Maintenance Burden: Landlords often deal with repairs and maintenance, which can be time-consuming.Commercial Real Estate InvestingPros:Higher Income Potential: Stronger cash flow and higher returns are common.Long-Term Leases: Tenants often sign longer leases (3-10 years), reducing vacancy risk.Professional Tenants: Business tenants tend to take better care of the property.Valuation Based on Income: Prices are based on the income the property generates, not market emotions.Shared Costs: Tenants often cover property expenses like taxes, insurance, and maintenance (via triple-net leases).Cons:High Entry Costs: Requires more capital or partnerships to get started.Complex Management: More expertise is needed; you may need a professional property manager.Economic Sensitivity: Commercial properties are more sensitive to economic conditions.Challenging Financing: Securing financing can be harder, with stricter terms and higher interest rates.Zoning and Legalities: More complex regulations compared to residential properties.Key Differences:Risk: Residential tends to be lower risk, while commercial offers higher rewards but with greater risk.Management: Residential is easier for DIY investors, while commercial properties usually require a team.Scalability: Commercial properties are easier to scale, offering more potential for significant cash flow increases.

The best the state real estate commissions have come up with is (1) licensure needed to “wholesale” legally and (2) full disclosure of intent to the seller. 

If the seller misrepresented tenant conditions, consult a real estate attorney about potential legal action.