I also had nice corporate salary when I made the jump with lots of angst, but its best to jump into the unknown.

Loans for commercial (5+) compared to residental (4 or less) multifamily differ and even though you have agency loans and subsidies, a large downpayment is required and therefore you go into syndication or partnerships which are a bit of an unknown for many new to the game.  

Peeping into windows, auto theft attempts, unknown parties at my property, that sort.

@Cory LucasEvery property I buy is sold as is, but I have often renegotiated for unknown issues.

@Joshua DorkinIt takes a brave person to venture into the unknown, a much braver person to admit they failed (which may not be the right word we RE people never fail er learn and get better) Anyways hats off to the best RE network there is. 

Both sold the first weekend they listed, for a currently unknown amount. 

They have another assessment of unknown amount announced to finish the balcony repairs.  

A second, unknown name was added as a payee- I learned to cross out any blank space after a payee's name through this. 

Tenants can apply and have background/credit screening done without providing the PM/ realtor/ landlord their SSN (I don't want to deal with that and they don't want to give it away to unknown people).

@Samarth Patel I always run numbers before going to or setting up showings to see if it is worth looking at, understanding that there are some unknowns.