At a minimum, having viable plans in place for development will make these lots more marketable and valuable to potential builders when we have conversations. 

Do I want something a bit more active or passive (how much time do I want to spend on this property or property project) That should start help you narrowing things down a little and once you're clear on all of that you'll have different criteria to overlay on when looking at deals in Perth/Melb/USA to fitCheers

Your story proves that being in the game creates opportunities you can’t plan for.

I guess I'm stuck with them for 1 year (or I guess I could spend $2100 to boot them). 

Your also spending 4-5k a year in taxes on a 90k house. 

Denver is a strong market with solid appreciation and plenty of opportunities, especially for strategies like house hacking and the BRRRR method.Your plan to start with FHA and house hacking is a great way to get your feet wet.

No one talks about 5 or 10 year Plans to make a Million in RE.

For example when someone wants to have financial freedom and spend more time with family, but then sets a goal by creating a heavy active income stream that involves their personal involvement daily.

Sometimes the tenants plan on paying a month's rent at two places to allow a less-hectic move. 

We send countless emails, and he answers us every 6/8 months saying he will work out a payment plan.