Should I pull the trigger? So many questions!

[Dominic Lucarelli]

I've been reading a TON and asking lots of questions from people who've been in home repair circles. One gentleman heard my story about beginning in property investing and passed my name to a potential deal-of-a-lifetime, but I still feel so GREEN that I'm doubting myself. 

So here's the nuts and bolts:

A commercial property with 3 small store fronts on the main level, and apartments above.

Left Storefront: $350 

Middle Storefront: currently used as owner storage

Right Storefront: Currently occupied as a Post Office Contract unit that pays a percentage of sales. Averages between $1500 and $2000 profit

2 bed apartment upstairs: $525

Studio apartment upstairs: $300

Water, Sewage, and trash are paid by the owner.

Total asking price (off market) is $100,000

Now, without the Post Office, this isn't a very attractive deal. It falls under the 2% Rule, BUT adding in the Post Office sales makes this a SWEET deal. Roughly 3% but I'd have to manage (or hire out mgmt of) the Postal business. And I'd still have a small storefront open to rent out or use as I see fit. 

Thoughts?