They will have additional costs for mailing & online campaigns to get leads.

That would be a helpful addition to your plan as you would further reduce your cost of living.Also don’t forget from that $600 you are planning on getting in cash flow you have taxes, insurance, maintenance, capex, and vacancy to consider.With two homes, you may want to keep that extra $20k as an emergency fund rather than spending it on a third property and then be left with no emergency funds.

Give your guests high speed internet and smart TV's - they can use their own log ins for the streaming sites.

This sounds risky, are you being compensated by additional rent and have you checked with your insurance to ensure you are covered. 

With the economy of scale in multifamily, each additional unit nets you a little more than the last, as a rule of thumb.

Purchasing the LLC gives you ownership of the property, but it also opens you up to additional legal exposure since the entity has been active, and there is no way to really know for sure what else they used the LLC for.

I was fine with all these numbers.Then I met with contractors...First, I wanted to add a new bathroom and approximately 450 sq ft of additional living space.

Would love any additional info and the chance to check it out! 

If you have any additional advice please let me know!

An example of one package we have is a Romantic Package - $199. 12 Balloons (buy the helium tanks and keep balloons on site for your team or use a local shop)Rose Petal Entry Way (bought off Amazon)2 Dozen Roses (local grocery store for $10-15 each dozen)Led Candle Display (bought off amazon and reusable)I Heart U Signs (amazon and reusable)Champagne (or wine if they want)This equals around $60-70 each time and we pay our cleaner $40 to set up.