I want to work my way into anything full time because I have a decent job now but eventually i want to have real estate/construction replace my income. 

How can I strike a deal where they can still receive some income from the property, but I can purchase the home and make my share and eventually (1-2 years away) own the home and eventually get full profit from this 8-unit property.

One property I eventually bought listed at 400K, but wasn't worth that much in it's current condition I offered 300K and it sat for 2 months before they sold it to me.

I eventually want to build on the lot but for the time being, I want to purchase it so that no else buys it first.

If I understand correctly your siblings goals are to sell their rental properties, use the funds to purchase a primary residence they'll eventually move into, and limit their tax liability correct?

I'm seeking to be in an environment with like minded individuals to learn and network to grow my portfolio and eventually network to collaborate on larger deals once I have a better understanding of the commercial side. 

Instead I want to take advantage of the opportunity I have of living rent free to invest my time and money in STR's to hopefully build that portfolio up and eventually make that my main source of income (I understand that will take time).

Your park name has now landed on someone's government desk and you will eventually be forced to answer a lot of uncomfortable questions. 

I appreciate the reply - that is eventually the goal.

The roof, AC, plumbing, electrical and flooring will eventually need replacements.