. $500k becomes $350k and throws off taxable NOI, etc.)

Sometimes, that's going to mean going off-market and doing direct communications with the owners of the right places to see if they may be willing to sell. 

This is what I did with my first two rentals that were paid off.

Follow the Orange Line, get off at each stop, and get a feel for the areas.

I currently also wholesale in my market and am looking for deals on my days off from my W2.

I sold off all apts, but overall it's is slow and steady investing in Winnipeg.

My family owns a 51 Acre lot off of a main road in Lakeside, Michigan zoned as R-2. 

Mainly:https://www.xe.gr/ (the greek craigslist)https://www.spitogatos.gr/ (literally translates to "house cat")https://www.spiti24.gr/ (english version available)https://www.tospitimou.gr/ (english version available) Those are probably your best bet.Although, as far as I understand, there are lots of off-market deals in Athens.Let me know how it goes!

Hang on to it long enough and the tenants will completely pay off the loan for you. 

If I got a Heloc, once the property is built, could I get a traditional mortgage and pay off the heloc and then tap into the new equity as well?