I could build 7 of these simultaneously in my market as a side gig in my spare time fairly easily, from a pure construction management standpoint, that is. 

You never know when calamity will strike like a stain, rip, or even burn. so be ready to replace as needed and not lose your spare. 

I love learning and during my spare time, I am always reading books about personal development, software engineering, mathematics, physics, and being a successful introvert entrepreneur(Just call me Elon Musk Jr lol). 

@Stella Xu, I'm also in financial services (formerly) based in Manhattan, now based in my spare bedroom.

I was that person 3 years ago that heard “Learn how to invest in real estate using other people’s money in your spare time”.

North jersey to me doesn't seem possible to create a cash flow of $200 per unit with the taxes and the amount the houses are price at the moment, for example, Passaic county or bergen. my plan is to buy a duplex in a C plus area in Philly, house hacks it, and rent out/Airbnb one of the spare rooms in the unit I will live in while I live there for 1 year then move out to repeat the process.

Im looking into buying my first place and renting out the spare bedrooms.

In addition to that, I've been driving around in my spare time and writing down the addresses of homes that seem to be in need of repair, although I'm mostly only seeing homes that have drooping blinds or peeling paint, not many true distressed properties.

If they can't spare 3 minutes to answer a handful of questions, they're probably not a tenant for me anyway. 

So I went home and got a spare set to let myself in to retrieve my keys.