Does anyone have any advice on how to purchase a 3 unit with 5% down on a conventional loan when you don't actually plan on living there?

The Question: If we cannot close on the property with conventional financing due to the tank, and the seller cannot afford to remove the tank she could be stuck. 

Also you can have 10 conventional mortgages in your personal name.

Is it possible to go From hard money to conventional refinancing As a investment?

Very firm for conventional mortgages.

If you can keep your rehab costs down that'll help since to refi to a conventional loan, the most LTV you'll get is 80%.

I purchased a $650K SFR recently with the 5% down conventional and my MI is below $150, this would be over $400 for a FHA loan with the same value. 

I used an fha 3.5% Down loan, lived in one side and then a couple years later refi’d that into a conventional loan then bought another duplex with fha (bigger for our growing family and closer to where I wanted to be).

Conventional financing cannot be used to buy this property."

conventional