The house i was purchasing was was a 2 story  4 bed 2 bath around 1900 sq ft.

They didn't pay and left the place a mess, with plenty of belongings like beds, clothes, bikes, etc. 

Initially, I didn't select this route because I'm not located in the central part of Austin, but I would like to give this a try since the room is fully furnished, but will require some bedding, artwork, and a desk.  

Get a 2 or 3 bed and rent out the rooms to your people.

I have a 3 bed single family in Atlanta.

The room is also furnished with a bed and drawers.

I think it's a hard question for others to answer for you, because it's entirely dependent on the nature of the project and your own interests and aptitude.I was my own GC (while working a full-time W2 job) on a 6-month remodel of a big house where we reconfigured the interior space, including relocating a staircase, converting part of the garage into an additional bed + bath and replacing the kitchen. 

Both of the units are 2 bed/1 bath.

I've done some rehabs to make it livable, but I'm finding it a bit challenging to rent out as a 6 bed, 2.5 bath house, whether as a whole or by renting out individual rooms.

We purchased it in November 2020 right before the pandemic at a purchase price of $330,000, a 3 bed 2 bath with a detached garage that was converted into a small room.