This way we don't have to form another LLC and all paperwork and band account associated with that LLC.

Is there a standard formula that takes into account the fluctuations of interest rates?

First ask the utility how far the notes go back on your account or for your address.

But I am single so there is no second household income.

Remember also that the interest on the loan is taxed at ordinary income rates.So for example lets say you have 100k and were making 8% in the markets - 8k per year and say you are in top bracket, you will pay $1600 in taxes per year or netting 6400.Now lets say you did a loan and were at 5% you are earning $5k per year (actually less because principal is being paid down and some of money goes into essentially a 0% checking account).

I am interested in investing in small multi-family and single family properties. 

Investment Info:Single-family residence buy & hold investment in San Antonio Purchase price: $204,000 Cash invested: $5,0003 Bedroom, 2 Bath Single Family House. 2017 Build.

Loans from a bank are about 8.2% for single family homes.

Even though it may require more work overall, it is incredible that a single investment can create enough income to retire.

Talk to a lawyer, he was wrong on both account and we pointed that out.