The sharks at the meetups will be obvious avoid them and build relationship with everyone else.

My question is while I was looking on redfin, I found a big 14-unit buildings that is for sale around $3 Million.

What are the pros and cons of building from scratch for the purpose of STR?

You don't want to rush to partner just to get your next property.If I was new again now and didn't have the capital to get my second one, I would go to every meetup in my area, meet other investors, and build relationships.

Build the relationship with them.

You're starting in the right place to build out your investment team.

They don't buy a lot, and even when they or any affordable housing developer buy land, it often can take forever for them to consider the property and then the actual escrow can be long if they are building the capital stack to buy the property. 

Building the right team of strategic partners is key to effectively completing development/new construction projects.

." -...this doesn't seem to be the case where the state building code wasn't adopted.

I believe my experience in the market can be valuable for both buyers and sellers, but I'm also eager to learn more about building a strong real estate investment portfolio.I'm particularly interested in BRRRR strategy, short-term rentals, and multifamily investing.While I sleep, eat, and breathe real estate most of the time, I also enjoy sports (go Vols!)