This is an easy answer for me!!!  

that we’ve learned in our 24 years, managing almost 700 doors across the Metro Detroit area, including almost 100 S8 leases:Class A Properties:Cashflow vs Appreciation: Typically, 3-5 years for positive cashflow, but you get highest relative rent & value appreciation.Vacancy Est: Historically 10%, 5% the more recent norm.Tenant Pool: Majority will have FICO scores of 680+ (roughly 5% probability of default), zero evictions in last 7 years.Class B Properties:Cashflow vs Appreciation: Typically, decent amount of relative rent & value appreciation.Vacancy Est: Historically 10%, 5% should be applied only if proper research done to support.Tenant Pool: Majority will have FICO scores of 620-680 (around 10% probability of default), some blemishes, but should have no evictions in last 5 yearsClass C Properties:Cashflow vs Appreciation: Typically, high cashflow and at the lower end of relative rent & value appreciation.

The industry is mature and margins have properly compressed.

@Albert Gallucci as many have pointed out, in the commercial space of 100+ apartment buildings and offices, property classes have some pretty decent industry standards.We started applying these to 1-4 unit properties around 10 years ago, which you can verify on our blogs, because we saw too many newbie investors not properly taking into account things like, neighborhood status, tenant pool, property condition, etc.Unfortunately, there's no industry standard for this, but you can use some basic logic to think your way through your own Classifications.

@Mattin Hosh it's not exactly easy to do this.DM us if you'd like to chat about it more...

It's not as easy as the social media gurus preach. 

im 16 and i wanna learn more about this business, it really inspires me like i wanna do it, so i joined here to learn more about it so in the future it will be easy for me. so what should i learn first?

It is surprisingly easy to manage out of state and if you want more tips on how, check out Bigger Pockets book "30 Day Stay" on Mid Term Rentals. 

You can use some easy number in Chat GPT to help you figure out what you need.  

AND THEY CAN SCREAM EASY AT THE TOP OF THEIR LUNGS IF THEY WANT.BUT GO AND CONVINCE YOUR NEAREST RELATIVE TO SELL THEIR LARGEST ASSET WITH YOU AT ONLY A 5% MARK UP AND YOU HAVE NO IDEA HOW REAL ESTATE EXCHANGES WORK.