It’s good to know that these options exist.

One of the duplexes is actually a lease option with a 30 year note.

Instead of converting into a multi family I was exploring other options. 

Quote from @Rowan Miele: When it comes to loans, check out FHA or conventional options, and maybe chat with a local lender for specifics. 

Additionally, investors can hire a property manager to handle day-to-day operations, freeing up their time and allowing for truly passive income.2.Real Estate Investment Trusts (REITs)REITs are a passive investment option that allows investors to purchase shares in a company that owns and manages a portfolio of income-producing real estate properties.

There are several different options whether it be passively investing utilizing some of the larger companies who do all the work for you or more active investment that will make your money go a little farther if you are comfortable doing more work.

Yes - LLCs can get 30-year loans - as others have mentioned, DSCR Loans are probably your best option. 

Quote from @Rowan Lane: If the high interest rates are killing your cash flow, it might be worth looking at other options.

I have options for a one time second lien on investment properties.

As Chris points out, private money is your only option. you cannot get conventional financing because you can't get anyone to issue a title policy on an active foreclosure.