Don't waste people's time and burn bridges.

So you have two choices--put more down (which effects your IRR so don't forget it to calculate it that way) or go with a bridge lender. 

I assume you mean Iron Bridge. 

Private lenders or bridge lenders may, but of course thats very expensive money.

The investor could potentially save on interest payments from the bridge money by taking out less money, again saving money on the labour side, and not worrying about the contractor splitting.  

Its got tons of upside because the whole area is currently getting new roads and a new bridge etc.  

You could refi into a bridge loan.

A lot of the older landlords are open to this since they still like getting the passive income every month, but don't want to deal with the management anymore.2) Partner with another investor who the bank would lend to. 50% of something is more than 0% of everything3) Buy with hard money / bridge loan first (the downside is these are higher interest), then refinance into a lower interest loan4) Refinance the rentals you have now.

It would be funded as a short term bridge loan, interest only.

Short-term (bridge) loan from a private lender - if you're purchasing a property in need of a lot of love and have a solid track record, you can often find a bridge lender who will put up a 1-3 year interest-only loan.