Just bought a property in cabarrus county and turned out the crawl space doesn’t just need a vapor barrier it needs to be incapsulated, with trenches a sump pump and an industrial dehumidifier.

Went well, there were a couple hiccups but they worked hard to overcome them and it turned out alright. 

I definitely recommend that you seek out a Certified Cost Segregation Professional so that you are confident in the quality of the work performed and the deliverables produced.

Prior Theories: It could be turned commercial (no)A residence could be built there (no)They bought it to sell to me at a profit because I am the only one who cares about this.

I do not unless it is an emergency so the pipe bursting recently was flooding their home and unfortunately they didnt know how to turn the water off regardless that I told them how before etc! 

Most areas you're not going to turn a $100k purchase into $250k sales price unless it needs $100k in rehab.

I am looking to sell an investment property and 1031 to a new investment property and would eventually move into that as my primary, but I haven’t been able to find any info on how long the rental would have to be a rental before turning it into our primary.

Then, I turned into a 6/2 and bought a condo for me to live in.

My question is - is it more advantageous to have me own the business entirely so that I can capitalize on the tax deductions & tax refunds so that I can in turn contribute more capital to purchase future properties together?  

This can turn adversarial quick.