Am I forced to just try and block off parking with some sort of cone and tape or what can I do to deter individuals for parking illegally?

LLC's are around and many people create them(individuals and large companies) on an annual basis, They can't all be creating them with no benefit in mind. 

@Jeremy L Riddle it sounds like it's maybe time to part as friends cashing in on the growth and profits at hand and re-deploy/leverage individually. 50/50 deals are the most dangerous for the point when there is any impasse. 

@Nick OttenbacherI have done a conventional cash out refinance with a similar type of property, prior to taking it through the subdivision process and selling them individually.

If you are 19, you have a few more years to go before you graduate and once you do, you can rent out the entire house instead of individual rooms.

I’m listing it as an individual, not via a property manager. 

I'm looking to get away from my hometown in O'Fallon, IL, for a week or so and stay with a family that invests in real estate or owns a business and uses it as a business write-off and to be a sponge and learn some information from wiser individuals.

I'd rather not do two individual replacements with the timing working out perfectly. 

Find a bank that is savvy with self-employed individuals. 

Looking into it, I see most hard money lenders will only lend to LLC's or other corporations, and not to individuals.