It was great meeting you at BPCON and I am so glad you are leaning into the power of this community to help you build your business.

That said, Solo 401(k) with Roth component can be powerful and does open up the discussion with your CPA or tax pro about paying yourself more (within reason), in order to make higher contributions. 

No Can Google/research provide you with the safe and comfortable environment and network in a journey that gets overwhelming and lonely?

This is what I typically use for my SFR direct mail campaign to landlords. but if you are targeting multifamily more likely they will have tenants in place, so that statement is not as powerful for your audience as it is for SFR landlords, that sometimes is hard to sell a property with Tenants in placeI hope that helps a bit

It's an incredibly powerful form of leverage.

This quick turnaround showcased the power of market timing and effective negotiation, doubling the initial investment in just one day.

I just want help or advice on building it from the ground up and not getting overwhelmed by all the options at once and take baby steps towards the bigger picture.

Refi'ing into a 15yr loan is likely to both increase your effective rate and crimp your future buying power by increasing your DTI. 

And if a family office will demand more power and ability to change things to their own liking.

This is what makes it so powerful.