I haven't seen financials but they've stated their net income is 30% (spec) and 20-25% (full custom), shovel to keys in 8-9 months.I'd like to help them execute an outbound S&M strategy but I'm new to this side of the RE world (I was a mortgage lender in a previous life and have some familiarity) and I'm trying to learn more about it.

I would say that you have a lot of opportunities for investing @Randall Alan explained well your financial strategies.With respect to what strategies to choose is depending on what you are willing to learn.STR depending the area is always a good strategy though you have to understand that is hospitality no real estate.Outside it will depend on the country and your knowledge.

Are there specific networking events, online platforms, or strategies that have proven effective for building relationships with investors?

There were some strategies to apply after compliance issues and you are good to go. 

It's been my experience that people talk a good game, but get serious alligator arms when it comes time to reach their checkbook.

Not a "hey let's read everything" journey, no, pick a strategy, get THAT highly rated "how-to" book. 

Feel free to reach out if you need assistance. 

My fiance and I are planning our post-wedding strategy and REI investing is a core part of our strategy.

His strategy for contacting motivated sellers for land deals is intriguing.

I thought that sounded like a great way to go and applied his strategy using Excel progs. to track my progress.