Apparently, local jurisdictions here are saying they want more affordable housing, but in the same sentence will also say that there will be more regulations, more environmental protections, and more hoops to jump through to develop starter homes. 

There are many local real estate investor groups or associations.

You can use local banks and there are national lenders.

Go to your local credit union. 

As for offering subject-to financing, this is something that can be advertised under 'seller financing' in our local MLS, and there's investors that search specifically for listings with that marked, so that should introduce your property to a new set of buyers that may not have considered it before.

As you're just starting out in Austin, focus on learning the local market, particularly areas with good rental demand and lower entry prices.

As for finding a contractor, asking local investors for recommendations is a great start.

Office, event space, wedding venue, warehouse, etc.

I found a 4 BR home next to local hospital. 

Right now, I’m in full research and networking mode—learning about Milwaukee’s neighborhoods, connecting with local investors, and exploring my first investment.