There are REOs that are in better condition than owner-occupied sales.

I would like to sell my rental properties on roofstock instead of via a traditional realtor since they are tenant occupied.

Number of units and whether you owner occupy are both important to know. 

I would at least do these numbers as if you are NOT an owner-occupier, even if you plan on house hacking 

The rear unit remained occupied until just recently when they purchased their own house.

I am not sure on what kind of financing I can get for the construction since this is a non-owner occupying investment property. any leads ?

In my opinion as long as you don't have delinquent tenants currently occupying the property and the deal makes sense in regards to your numbers who cares what the market is doing if its a long term hold. 

We did a $23 million retail re-fi, lender had to put earn outs for the rest. 98% occupied, strong tenants

We are on schedule to get it refinanced and occupied within the next few months.

Owner occupied or not?