Here are my two questions...1) Has anyone done this in Texas, and where do I start in regards to zoning regulations to make sure I can split this up into 4 separate units?

That said, real property law and regulations are obviously not the same in other countries, so their markets will be different than what the US's secondary market looks like, allows and acts like.  

Its unlikely that 100 extra square feet would move the needle on the price.Also I would lean on your agents advice (Though if they are charing a half a percent, you also get what you pay for).Each state has different laws and regulations on how to measure square feet. 

My take is that if Patch of Land is strictly following their compliance obligations under the SEC and other State & Federal regulations, this should be taken as an extreme positive.  

Both companies are actually still using crowdfunding, because they are using regulation A+ for these 2 offerings.

I can't say there's a book that gave me much insight on specifics, mostly because the structure of so many deals is based on the market that the property is in, and regulations change so often, a book of that nature would become obsolete fairly quickly.

Real estate is highly regulated and orgs in control may be overthrown, but it will not happen overnight.   

Also I assume it's each city/county is different in terms of regulations but I'm asking as a whole. 

Maybe it has a database of rules and regulations from EVERY county in the country.

Or is that kind of thing stipulated entirely in the existing lease, with no overarching regulation?