This protects against potential claims and liabilities specific to the rental.For tax purposes, maintain clear records of rental-related income and expenses, allowing deductions for insurance, utilities, maintenance, and depreciation proportionate to the rental unit.

Specifically, I am looking at partnering with an individual who owns securities (stock and mutual funds) having them take out a line of credit against their portfolio (SBLOC) at a low interest rate, and using that to purchase properties rather than using a mortgage.

Income will depend on your plan for the specific asset. # of units doesn't necessarily equate to how much income you could make.

They are a new international lender in Costa Rica offering 30 year, fixed rate mortgage loans specifically for American investors.

In that case, you’d typically need to file a legal challenge, which could involve going to court and showing that the restriction is unnecessary or unreasonable.The best advice I can give would be to consult a real estate attorney to understand your specific situation and options.

I the understand the wiring for this specific purpose equipment can be considered with the tangible property. 

Specifically, what research results told you these were two good cities to invest in?  

lots to learn here just browse around and you'll pick up on stuff and know where to hone in more im specific areas you are interested in. 

Use this meeting to gather their perspective on the property and understand their goals before making any offers.Keep It Informal Initially: Avoid jumping straight into specifics about pricing or terms.

Hopefully those that stayed on the sideline until the 'time is right' will start underwriting specific deals and recognizing path of progress opportunities that offer multiple operational and exit strategies.