Start the apprenticeship, grind it out, go to college at night (night classes are mostly geared toward working adults), use your military benefits if you can, search for rental property in the meanwhile.Sometimes it can take a year or more to find a deal.

For those of us still grinding, the same principles apply, only now that extra cash can result in opportunities to buy companies at a discount. 

I know if I hear a noise in just my car I should turn the radio up and head to a shop.

No noise problems with pipes.

The commercial use should generate a minimal amount of traffic noise.

I had some guy rent a room in my house and he failed to mention he worked nights - I quickly realized this when he'd arrived home at 5 AM making too much noise. 

Bottom-line, if you ran your numbers thru the calculator with accurate projections as a rental (not as a owner-occupant) and show negative cash flow, I would avoid ithe properties in questions and keep grinding. 

-German Shepherds are wolves that grew bored with the pack and now live in my home; liabilities be darned...I am here to share what I know, grow where I am weak, and obtain a stronger relationship with my girls by slowly ending the indentured servitude to my daily grind.

In my experience, the most common issue is noise between levels.

Top/bottom duplexes are not preferred to side by side because of noise, water damage, access.