Because Airbnb only makes money when the guest books on Airbnb.Hence, they want the price to be cheapest on their platform, so people book on Airbnb instead of elsewhere, and want their properties to be able to compete with hotel prices (even after cleaning fee and service fees). 

I would also make tenants start paying water, as soon as their lease renewal comes up, with a flat monthly fee.

Yearly bank fees for each, aka choose your bank wisely.

Each closing, whether multi-family or single family, is going to have some of the same costs: title insurance, attorney fees, inspection fees, appraisal fees, fees associated with financing, etc.

And in that case, you would still need to sue but then you can only sue for the unpaid balance of the agreement and you will have to attempt to locate the debtor.I would make sure you have a clause in the contract that states that if they don't make the repayments as per the agreement, that attorney's fees, late fees, interest and some other penalties are payable.

There are consulting companies who do this (for a fee) and i can also share some contacts if you need some. 

Now most of the time we don't see househackers/investors use in-house or portfolio loans from banks because sometimes they have more restrictive guidelines and higher fees for holding it which might cause the numbers not to work or for the deal not to go through entirely. 

Is saving the fee a PM charges worth the potential thousands in cost and headaches?

Here are the numbers:IncomeTotalPartner ContributionsManaging Partners Debt$0.00Partners Deposits$987,459.99Total Contributions$987,459.99Operating IncomeAirbnb Income$50,186.50Square Income (Vehicles or add-ons)$6,741.04Total Operating Income$56,927.54Total Income$1,044,387.53ExpensesPurchase of propertyCost of House-680,000.00Closing Costs-$26,744.44Total Cost of Purchase-706,744.44Set Up ExpensesHouse Improvements & Care taker home addition-116017.03Adding Tiny House-52130.83Furnishings-68403.65Vehicles-43150Set Up Costs and Advertising-2339.53Total Cost of Set Up-282,041.04Operating expensesCare Takers-14535.9Additional Cleaners-1505Cleaning Supplies-2670House Supplies-1340Landscaping-4230.66Utilities (Power & Water)-8204Internet-315Pest control/fumigacion -120Pool cleaning/maintenance-2220Vehicle Gas-552.3Vehicle Maintenance and Repairs-6625.01Welcome Food for Guests-115Property Repairs-4999.64Bank Fees-1208.06Accounting Fees-1085Insurance-955.74Other Expenses-1071.2Total Operating Costs -$51,752.51Total Expenses-$1,040,537.99Net Income$3,849.54Net Operating Income$5,175.03Now 5k for an investment of 970k is not a good investment.  

Also there is a management fee to pay for all of the above.