I own student rentals so the original “co-living” and STRs.

Co-mingling funds and using it as your alter-ego is the fastest way to pierce your corporate veil.

I am looking for some direction into the best markets in Florida where I can utilize the skillsets I have built here in Colorado.

With that said, you could run it with you as a non-occupying co-borrower and go either FHA or conventional.Here's the FNMA guidelines for the HOM. 

Thanks in advance for ahh my advice We should be able to go FHA or conventional with you as a non-occupying co-borrower. 

A few questions I have top of mind: Does it cost anything to hold an LLC in the state of Colorado?

Another said if my builder co-signed on the loan it wouldn’t be a problem. 

As of 2019, the states with the highest number of foreign-owned acres were Texas (4.4 million acres), Maine (3.3 million acres), Alabama (1.8 million acres), and Washington and Colorado (1.5 million acres each).

In Wisconsin the Rock Co area is a good market right now.   

As for the situation with your brother and a partnership, co-ownership, I would sit down with him and have a long talk, if you haven't already done so.