We never spent a penny of the cash flow and just kept reinvesting it... the power with multi families is in the cap rate.

Looks like there’s some good suggestions in this post here: https://www.biggerpockets.com/forums/44/topics/415375-where-to-find-framing-contractors-who-arent-general-contractorsYou could also call up carpenters who do decks, gazebos, etc. and ask them if they can do framing as well... might end up paying a pretty penny that way though. 

After running the numbers multiple times and not trying to sugar coat them at market rent, units B-D would cover my PITI, but I would basically be on the hook for everything else which includes future pest removal, the 230 avg water bill, 80 avg trash pickup.This is my first home/house hack and I'm eager to jump into the business to get experience but dont want to set myself up for massive regret. 

Live with your parents as long as possible, and save every penny so you can get your 30% down on your first rental property and then continue to live with your parents and leverage that equity for more.

Off the kitchen, we have a coat closet locked up, which holds the booze and personal cooking items.

. $150k and a 20% downpayment is about 30k... almost every penny I have in my young age.

You really will not have to put a penny into it. 

If it’s copper (or plastic), I can’t imagine anyone who would require it to be replaced.

I have had cement in pipes, water left on to flood basements, ripped out copper, etc.In higher end homes, the risk is owners that have lawyers or are smart enough to know that they can fight the system and resist leaving with legal tactics for several weeks.Occasionally you get both issues but not normally.Of course, if the occupants are tenants with a lease it brings up other issues.For me, here is the key tip for what you are really asking....which is... how the hell do I make sure I don't lose money when I can't see the inside? 

I just started digging into all the nuances of what it might take for building a new project and I do understand it can cost a pretty penny.