I am also concerned that when the economy starts to weaken, the more rural areas will get even more challenging.  

A couple of things that are concerning: you're still in college and you mentioned having a minimum wage job and your brother just started his W2 job that pays $45k + commissions. 

Fear and comfort are what hold us back from anything new (regarding finance, work, relationships, health, fitness, family).

I suggest reaching out and speaking with them about your interest and expressing and concerns you may have.

If they give very little information or the new capital will only add a year or two to the viability of the deal, then I am likely not going to give them more money.The changing or stopping of distributions and calling capital are very stressful and concerning events when you combine it with a lack of information and transparency from the syndicator. 

If the place is going to be vacant anyway, what is the concern about multiple treatments? 

My concern with being in 2nd lien would be the hard money loan.

This will be important for tax purposes and overall financial management.If you're feeling overwhelmed at the end of all this, consider hiring a property manager or consulting with a real estate attorney who can guide you through the process and handle any legal concerns.

In a simplistic metaphor, the FED needs to balance out the health of the economy with inflation.

Shouldn't be the top concern, and cabin/tiny homes can be superior investments, but something to consider