You will DEFINITELY find lenders/brokers selling a nearly identical product in the 7s and 8s but don't settle for that. 

. $9 1/2 gallon of milk. $10 loaf of bread.

Just becareful as once you "scale" this idea, I THINK you can run afoul of the Security and Exchange Commission (SEC) since it becomes a syndication or some sort of regulated investment product. 

Keep milking the cow until you want can't no more! 

So revised plan, the product you want/need does exist.

I know Meridian bank offers a product like that but often the problem is that it needs to be non-owner occupied for hard money.

@Nidal DaraisehUS Bank has a construction to perm loan product.

Try to find a product that has an add value ability from the exterior items, the interior concept including washer and dryer location.

Or what financial products should I use?

@Ilya Aksenov the FHA 223(f) loan product is used for multifamily units over $1Mil.