That said, even with conservative rental income estimates, my living expenses would eventually drop to several hundred dollars less than what I’m currently paying in rent once the house hack starts generating income.I do have cash reserves to weather some rough patches, but the idea of pushing my budget this hard makes me uneasy.

One property is not furnished and has an unfinished basement that we'll eventually be converting. 

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

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’m 37 and I’m wanting to do real estate full time eventually(if it takes 5-10 years, that’s fine). 

Eventually the masses will catch on and then the model is tougher to continue to do. 

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. 

I am looking for a solid real estate agent and eventually will need a home inspector, possible property manager/etc. in regards to the process.I have a few family friends which I am blessed to have mentored me the past few years in this field and I am determined/diligent to learn and grow. 

I am a newer investor with a duplex and living in a SFH to eventually be a rental.