My company does the following:• Free and simple MLO Licensing (22 hours online or in person and you choose your schedule)• Mortgage team to handle the backend (meaning, no structuring, underwriting or processing loans) • Competitive mortgage rates backed a company with 20+ years in the business• Downline revenue stream on the lending side (similar to EXP model.)• They do not have to change brokeragesIn my mind, there aren't many cons to this.

Have you found a solution (be it a person or technology)? 

If you mail, be sure to mail to the correct address which can be found on the instructions (first result on google if you google "form 4868")If a payment is due with any of the above, you can include a check with your mailed form, or you can pay directly through the IRS DirectPay system and select "extension" as the reasoning for the payment.

But they definitely heard a story from another person that never owned one about how expensive it is. 

But, that is not always the right answer and you should speak with someone familiar with your personal situation to get advice specific to you.

Does anyone have experience transferring a rental property to an LLC from their personal name?  

If you intend to do the rent by room strategy the ideal situation is for each guest to have their own bathroom or, at the most, to have to share it with one other person.

Also, I personally know Nancy and others mentioned in one of the posts and I PERSONALLY know they are doing as well as they say they are!!

If you personally reach out to an off market property, the seller may say they will not pay your agent, leaving the compensation up to you.

I personally like to stay in mine for 3 days atleast while I setup to know my properties more intimately and to work out the bugs which would be problems for guests.