I took too long to get my property rent-ready, which led to a significant loss of potential revenue.

Everything time a property owner has turnover they have costs for releasing, vacancy, painting, cleaning, make ready, etc.

From the videos I watched and everything I read I think RESimpli does a good job of that.

Get ready -- I'm sending you a connect request!

Closing costs + rent ready costs + lease out costs - those you need to be compensated for and new investors are always surprised that they can add up to 5 or 10 or 15K.  

I was ready to get into Airbnb, so this was also my first Airbnb :) How did you find this deal and how did you negotiate it?

BiggerPockets also has a calculator to analyze deals, and I highly recommend you start this as soon as possible, even if you are not ready to buy.

Does it come fully furnished and ready to go or do you need to outfit the place?

I have better luck with posting in the zillow rental section;   rent before you buy, live in a great property while you get yourself ready to finance a great home....Our business model;   protect the buyer or tenant at even our own expense. 

Quote from @Dennis McNeely: In a sandwich lease option, the investor exercises their option with the property owner to purchase the property when the tenant-buyer indicates they're ready to exercise their option and purchases the property.