There's not a typical ratio that I know of, but you can intuitively know what a reasonable number is given the immediate vicinity and when it's been vacant in the past.

That's your choice.Then I'd talk to a Landscape Architect and have the person come up with some curb appeal ideas, and then get bids on that.If the total cost comes in below the per door cost to move forward then it "MIGHT BE" a go.I believe looking at each unit as one job to be completed is more intuitive than looking at the whole complex as a job to be completed. 

I've been operating here about 2 years now (boots on the ground) and I would guess that over 50% of the professionals I've interacted with are unscrupulous. 

So i figured I'd interact with the community even if it was just asking for advice. 

So don't limit your interaction to the local area.

Interact in the community and provide value wherever you can.

You could say I still have a ton of market research to do in front of me :)Anyways, thanks for reading and I can't wait to interact with all of you on this forum. 

Nowadays you can gain the same education through online school, at the cost of interacting with peers in person.

With the right property mgmt in place, we will never interact with a strictly investment property. 

That sounds counter intuitive, but the reason it's true is because with more units, you can afford to save more money in maintenance reserves, you can afford property management or a full time repairman, they are much easier to finance (I've had bankers tell me that multimillion dollar properties are easier to finance than single family homes) and so on.