A 8-10 unit (when you can find them) range about 3 million. 

You'll need to make sure your agent is finding off market deals.

@Ken M. always find it humorous when OOS investors ask what's the best zip code in invest in Detroit!

It's a free country, you can run your business how you see fit:)That doesn't really work for self-managing property owners or what investors want from the PMCs they hire.So, yes we find solid contractors at Home Depots on Saturday mornings.When's the last time you've been at a Home Depot during that time period?

It's on a Main Street (Perry BLVD), and it is on a bus line.About 8 months ago, one unit went vacant, and we can't find another tenant no matter what we try or how low we go with the posted rent.

Find a new friend.I would get rid of them for just one of those issues.

Most of this you can google and find :-). 

If you are not finding good deals money wont find you.If you earn a decent wage and are credit worthy you can start investing by house hacking a multi family with a low down payment mortgage.If you have no money or credit your best best is start finding deals and bringing them to other investors who have money.

Without any cash it is unlikely unless you can find a 100% seller financed deal (they do exist, I just did one a few months ago).

Every day is an amazing experience  helping investors and clients find the right property. .