I think it is an excellent idea to give gifts from time to time.

Seems like a win win scenario.

Since this is a numbers game, the only way you can answer the question is to do the following:Establish a relationship w/ a realtor winning to run some comparables for you showing the potential value if you convert from a 2 flat to a singleIf the values are not significantly hire than your mortgage then hold on to it as a 2 flatIf the values are significantly hire than your mortgage then get some estimates for converting from a 2 flat to a single.  

Will the wife win this battle or will I?

You win some...you lose some.

I found that area to be an excellent opportunity to create passive income and strong capital gains.Looking forward to connecting with you, who knows maybe even do a deal together!

I like playing with the calculators, and I'm too lazy to replicate them in excel myself.

Vacation Home, large 2 story 3/2 in excellent condition in the countryside of Torremendo, 20 minutes from the beach on the west coast of Spain.

One minor correction to an otherwise excellent response. 

Only information i was able to obtain was that i needed to bring 20% of the winning bid "Certified Bank Check" and come up with the remaining amount within 30 days.