Can I partner with someone else and go 50% each on a new property (with my share of 50% equivalent to original Condo I am selling) and do a 1031 exchange?

It’s the equivalent of spending a dollar to save a dime.  

It comes from the IRS holding that Leases of real estate greater than 30 years are considered to be equivalent to fee simple ownership of the real estate.In a 1031 exchange you must sell your old property before you take title to the new property. 

Not 100% equivalent, but hopefully you understand my point.All of this is based on how I can reach my goals.

I'll take a look at the South African equivalent

My first mortgage's interest rate is very good:)Luckily I found Figure.com, who offers pretty good rates for a 30-year fixed home equity loan, which I thought is almost the equivalent of cash out refi, if not better.

-- Or, is it okay if the salaries are equivalent and I have the 2 year history? 

You might need to follow the SEC rules for the USA and then equivalent regulatory agency in the foreign country.

You can kick them out, but I prefer to try to create situations that are not likely to develop into problems and holding everyone equally responsibly goes a long way in the right direction.In your case it sounds like you have college students or adults at an equivalent or lower level of responsibility which is very common renting out at the room level. 

@Anthony Rosa When you say Pre fab, are you talking about Modular (built off site to UDC) or Manufactured (built off site to HUD code) most municipalities will not allow Manufactured, and many subdivision covenants do not allow any home to be brought in, they must be site built. generally the only savings with factory built homes are time, the cost is pretty much on par with site built vs equivalent Modular, Manufactured the same floor plan will be about 15% cheaper, but your resale will suffer dramatically, as Manufactured homes tend to depreciate over time.