With an opportunity like this, how can I take advantage of it?

Hi all,Looking at potentially picking up a 4plex (recently renovated, $425k asking, rents are $4050/mo gross + $1045/mo gross RUBS) in the Larchmont area, currently off-market opportunity. 

When I graduate should I try to do this plan and just rent (yuck).. there’s just not much opportunity for house hacking here but I want to be doing something when I graduate.

I knew it was a great opportunity but would require a lot of changes.

My wants are a 10-15 door unit in the 750-900k price range but would consider something larger if it was a good opportunity.

There's a big opportunity cost to paying down existing properties instead of purchasing additional ones. 

This being said, the 1st of our 3 opportunities will be an ongoing funnel of bank approved clients that are looking for a new home which we can provide that is basically hurricane resistant due to our patented building system which will be built on lots being offered to us by a private land owner, who will get paid once the home is built and family takes possession.

My wants are a 10-15 door unit in the 750-900k price range but would consider something larger if it was a good opportunity.

However, with the $5K fee charged upfront, one must look at the payback period and add in the lost NPV that $5K has hidden inside (ala lost opportunity costs).

The opportunity cost issues are: having to pay all utilities plus a housekeeper along with some regulatory overhead from the State, along with some "gotchas" like not being able to put locks on bedroom doors or you're technically operating a boarding house which is a whole different can of worms.