Hi Allan,Yes, it is possible to list your property for rent on platforms like Zillow, Apartments.com, and Avail.Co without displaying the exact address to the public. 

Renting the spare bedroom gets us to $1350 each.

You are having trouble renting; REALLY?

I have also seen the barrel saunas do well from an occupancy perspective, but they haven't noticeably increased ADRs from my perspective. 

For a $300,000 property, this could be $6,000 to $15,000.Mortgage on Rental Property:Loan Amount: $240,000 (assuming 80% financed at 4% interest over 30 years).Monthly Payment: Approximately $1,145.Other Expenses:Property Taxes: Estimated at 1.5% of property value annually ($4,500).Insurance: Estimated at $1,500 annually.Maintenance: Estimated at 1% of property value annually ($3,000).Property Management Fees: Assuming 10% of monthly rental income ($2,400 annually if rent is $2,000 per month).Vacancy and Turnover Costs: Estimated at 5% of annual rental income ($1,200).Total Initial Investment and Annual Operating ExpensesInitial Investment:Total Borrowed from Equity: $150,000Down Payment for Rental Property: $60,000Closing Costs for Rental Property: $10,500 (average)Total Initial Cash Outlay: $70,500 (initial investment from equity) + $10,500 (closing costs)Annual Operating Expenses:Property Taxes: $4,500Insurance: $1,500Maintenance: $3,000Property Management Fees: $2,400Vacancy and Turnover Costs: $1,200Total Operating Expenses: $12,600 annuallyExpected ReturnRental Income:Assuming $2,000 per month, annual rental income = $24,000.Net Operating Income (NOI):Annual Rental Income: $24,000Minus Annual Operating Expenses: $12,600NOI: $11,400Debt Service:Mortgage Payment on Rental Property: $1,145 per month, $13,740 annually.Total Debt Service: $13,740 (rental property) + $8,592 (equity loan) = $22,332 annually.Net Cash Flow:NOI: $11,400Minus Debt Service: $22,332Net Cash Flow: -$10,932 annually (negative cash flow initially due to high debt service).Cash-on-Cash ReturnInitial Cash Investment: $70,500Net Cash Flow (first year): -$10,932Cash-on-Cash Return: Not applicable initially due to negative cash flow.Long-Term Appreciation and AdjustmentsProperty Appreciation:Assuming a 3% annual appreciation, the property value could increase by $9,000 annually.Rent Increases:Assuming a 2% annual rent increase, rental income will rise, improving cash flow over time.

Getting alternate financing (wm2nd, heloc, etc) for equity position may be possible but it will 1) be at market rate 2) may increase the due on sale clause. 

My furnished MTR is renting at a lower rate than I can get for the unit as an unfurnished LTR.  

Note, as an experienced landlord I was able to get control of the tenant situation with little issue, raise rent and have had no real issues with the tenant since.

We plan to live in one unit and rent out the others.

Rented it for a few years then slowly started making updates to increase rent.