Sound proofing is super difficult and expensive, like borderline impossible in my experience, so probably not worth it.

As a first time developer it will almost be impossible to source finance, they will want to view your track record/projects.This...…. with current negative market sentiment adds another layer of risk.I started developing with a small build, project was 3 villas. 

The lender I was working with at my local bank was great at responding and giving info up front but now seems impossible to contact.

I got my contractor trying to reach him, as well as my insurance agent and it’s like it’s freaking impossible to get this man to respond....

I also realize its near impossible to do things 50/50 from what I've heard, I'm currently trying to find threads on here with peoples experiences.

Although not impossible on the 2-4 unit small multi family side, you would find it a lot easier to find B class commerical multi family properties in order to invest in and make a profit off of. 

You'll be competing against people that are more educated, 2-3 times your age, and with far more life/job experience that will be far more relatable to the average buyer/seller/investor.It's not impossible but you should go in with eyes wide open and know what you're up against.

Some of them are impossible to fix without a big upgrade that requires them to move out.

From your post, it's tough to figure out what you are trying to do and pulling out equity without seasoning, while not impossible, in my experience it isn't always a great strategy.

Once you reach a certain threshold it will become impossible to find deals that other groups of investors dont already know about.