I have a two level rental, and learned that they have some disadvantages. 

The longer closing date can be a disadvantage with some sellers in a competitive situation.

And since everything in your area is gas you are not at a competitive disadvantage. 

From reading forum posts there is a lot of controversy on this topic and strong opinions on both sides of the argument, can you give a few examples of how starting an LLC for a SFR rental property may be a disadvantage?

Invest your money wisely.The Advantages and Disadvantages of titling your Rental Properties into an LLC.AdvantagesThe main reason investors prefer to have their rental properties in an LLC is for asset protection.

When using an FHA or VA loan it puts you at a disadvantage.

They will try again if above deposit performance was incorrect.I still believe the 'benefits' of placing little houses with debt inside LLCs has way more disadvantages than advantages.   

Turnkey is an option, as is looking at being a lender, whether buying notes or loaning hard money directly.At the same time, even if you never pick up a hammer, you'll be at a severe disadvantage if you don't learn how much different repairs/rehab items typically cost in your area.

This is a huge disadvantage for those with nicer rentals.

I want to hear opinions on cost segregation and advantages/disadvantages of the process.