I explained to the landlord what my business plan was, and paid him a set rent amount each month (though slightly higher than market rate rent).

It is a big reason my last purchases were Dec 2021 when the rates were less than half of the current rates (I purchased $4m that month that I have already made ~$1m from).  

The downer is that financing through an LLC would mean “commercial loan” which has a high interest rate of nearly 9% in today’s high rate environment.

You do not indicate what your current interest rate is.  

Along with that you purchased at a decent price, cheap rates so your mortgage should not be expensive.

This will give you more time to shop rates/fees than to be under the gun with a purchase loan. 

As Ko Kashiwagi says, we need to know more, such as rate, amortization, term.

Are $300/squares for GAF HDZ good rates.

This has definitely paid dividends for us when it comes to mortgage rates and lending options. 

While the traditional approach involves buying a multi family property, living in one unit and renting out the other - with rising prices and interest rates; others have considered renting out bedrooms as unit spaces.