No matter where you live or where you own assets, I personally recommend the Series LLC to be a great tool for the individual investor who is planning to expand their operation, as it allows for you to scale infinitely for FREE- check out this article to learn more. 

Your COC is going to be close to infinite, because the money you put in up front is almost all returned to you when you refinance.

If you borrow 100% of the costs, your ROI will be infinite and it doesn't matter if your profit is $100 or $100k.

Hiring a professional inspector is infinitely better than looking at it myself.I know a few people that have flown out, taken a look at a "meh" deal, fell in love with the house ("I'd love to live here!")

ROI is infinite if you have no skin in the game. 

I try to pull all of my capital out of the property so at that point, the return would theoretically be infinite. 

Your ROI should be infinite at this point with no money left in the deal.

Sure, the bank gives you 1% interest on a savings account but that's (literally) infinitely better than it sitting in a mattress earning nothing.So...so...SO many questions :-)

Starting off by house hacking is the best advice, then you can live for free, save way faster, and from there either flip houses, or use the BRRR strategy for infinite houses in your portfolio and infinite returns, (you can google BP BRRR strategy to see how it works).

It can also scale infinitely at no additional costs, fees, or filings.You will want to obtain personal financing on the properties since the rates are better than the commercial loan rates.