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.

What seems most attractive for now seems to be multi-family markets starting out and eventually moving into 5-20 unit properties for growth. 

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 was eventually going to pivot to multi family after getting my feet wet with fix and flip, but I am wondering if I should just jump in right away.

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.

I know I will be back eventually but if I remain in the US for many more years the tax implications are a bit scary. 

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

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 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. 

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.