An example is-what does it cost a mgmt. company if the owner loses a month of rent because there is a vacancy?  

It does potentially reduce your vacancy cost a bit.

An upscale home will cost a bundle.

If he accepts your offer, expect to pay a little more because you are being specific and causing the project to cost a little more and take a little more time.

Fannie might ask you to give it back and allow someone else who meets the qualifications to purchase, there is a cost as you were given more than $10000 in costs to be eligible to buy this house.Fannie can see: hazard insurance, names on utility bills, and they do check. 

This  past year I bought a cabin in the woods in Lakeside, Arizona and last Friday, I just closed on a beautiful property in Costa Rica.  

This sounds like one of those stories where extradition officials are looking for you in Belize or Costa Rica a couple of years from now 😂Don't believe all the hype about "Go big or go home".

I have opened a dozen businesses in my life and never did it come without cost, sometimes a great cost. A

Now if you own fee simple thats another matter two of my clients own large fee simple homes 5k sq ft and one thats 10k and those cost a lot of money for what they basically 1k a sq foot or more.  

It cost a couple of hundred dollars for the motor.