BTW expect the rates of these from banks etc to be somewhere between 9-12% at a min - which in most cases does not provide enough juice from the squeeze. 

@Jake Simon Did you ever find a bank in Ohio that would provide a HELOC on an investment property?

Refinancing can allow you to pull out equity, providing you with additional funds to use for the down payment on a new property.Look into financing options for purchasing a duplex.

In a nutshell, Fannie Mae Homestyle loans enable financing for property renovations alongside a purchase or refinance, while Community Second Loans provide subordinate financing to bridge the gap between down payment and closing costs.

Paul - you’ll want to get a lawyer to create a  new lease that provides necessary coverage or at minimum an addendum for sub-lease/arbitrage situation.

I'm curious what are you going to provide that is better than existing CRMs, LinkedIn, this site, Facebook, etc?

Having your LLC name attached to the plans does provide some protection, but it's wise to check with legal counsel to understand the full extent of that protection. 

Contact the utility provider and get a historical average based on the last year of use.

They can provide insights into tax implications, specific filing requirements, and potential deductions.General advice?

Provide the tenant with a legal notice that no unauthorized occupants can be living in the property.