Finally, as an aspiring/budding lender, I don't have as much access to mentors, but then again it's easier than rehabbing/flipping and probably easier than buying and holding and managing multifamily. 

But occasionally we have issues and tenants need to be asked to leave or just decide to disappear in the middle of winter and it sucks.The worst part is I find the quality of tenant interested or willing to move this time of year isn't the greatest either - often times there is a reason they have to move right now since most landlords don't like ending leases this time of year.Either lower your rent or just hang in there.

@Craig DanielsI own a local top reviewed real estate brokerage and property management company in palm bay.

I've managed up to 400 rentals and never offered a concession.

Sounds like you’ve got a solid foundation with your GC and project management experience.

Is she paying a property manager?

The BRRRR strategy, which stands for Buy, Rehab, Rent, Refinance, Repeat, focuses on long-term investment, while the Fix & Flip approach involves purchasing, renovating, and selling properties for a profit.Investing in Airbnb rentals presents a distinct set of challenges, requiring active management and a thorough understanding of local regulations, but it also has the potential for higher returns.Here is a concise overview of the advantages and disadvantages of each method:Fix & Flip:Pros.- Potential for quick profits - Enhances property value - - Adaptable to market trendsCons.- High risk - Time-intensive - Requires substantial capitalBRRRR:Pros.- Builds long-term wealth - Generates rental income - Increases equityCons.- Complex process - Requires financing - Dependent on market conditionsAirbnb:Pros.- Potential for higher returns - Flexible pricing - Short-term commitmentCons.- Requires active management - Subject to regulatory risks - Income can vary seasonallyI wish you the best in your new venture.

Quote from @Obed Calixte: There are a ton of free tenant applications online and through property management software companies such as turbotenant, rentspree, zillow etc.You will want your application to meet any state specific guidelines (if applicable). 

With rehabs you want to know enough about how houses work to manage the tradespeople.

Rinse and repeat as many times as life allows, or convert to buying pure investments.Consider employment with a property management company.