Assuming you've paid your student loan off and put the rest down on your new house, at some point after buying your new house, you could take out a small HELOC to be used towards a future investment. 

After working my company for 6 years I’ve come to a realization that I need a back up plan for mine and my fiancés future.

At some point (it may be too early), you will need to start thinking about business succession planning, and when that comes to play, understanding what your options are will be instrumental in helping you make a good decision for your financial future.

Also using the cash for future down payments.

In the future you need to set a date on which you evict everyone who hasn't paid.

Remember, when thinking about doing a short term loan and then a longer in the future, you'll have closing costs each time, so build that into your finances.

I try to assess the future of jobs 10 to 20 years down the line.

However, i do want to learn about it for the future.

Due diligence for land use is not much different than due diligence for REI... you have to understand constraints, opportunities, and know who to talk to.I would consider myself (and many other architects) the right first step as to what your current/future options are.

@Jared G.Welcome to BP, and congratulations on making the decision to invest in your future via real estate.I have written a few blog posts that may help you get started here on BP, and with your investing.