Some states also require an annual license fee to own and operate an LLC so that could also cause a potential for increased costs there as well.I would consult with a real estate attorney to see if an LLC makes sense from a legal standpoint and advise your accountant as to your decision so the appropriate tax filings can be made. 

Hope that makes sense. more on this below. 

@Chris Seveney Doesn't make sense on every home in every market.

People use the rule, but the rule makes no sense because it does not take into account building upkeep and cap ex.Look at this awesome building you have.

Essentially, this follows the BRRRR (Buy, Rehab, Rent, Refinance, Repeat) method, but with the twist of continually developing more homes on the same piece of land.Do you think this strategy makes sense?

Will have to revalue full company so buying out the existing company would make sense.

If time is NOT important then listing at a higher price might make sense.

One more question: If I approved the 20 year old with a co-signer and then allowed the 17-year-old to be listed as an occupant, would it make sense to have him sign as a tenant when he turns 18 in 5 months?

Thanks Matt for your inputs makes sense.

Also, dynamic pricing could make sense if you're looking to have rent fluctuating.