Sibling, cousin, aunt, uncle, nephew, niece might be permitted ...The folks who run the SDIRA can usually give you info like this, identifying prohibited vs acceptable.

If they are not a disqualified party like say a sibling then there is no issue with what you would like to do any more so than any other person you could deal with.

Even if they probate the estate, who might you have to deal with, i.e. a bunch of siblings? 

My siblings and I grew up in this home.We manage this home.

I will be moving with a sibling first, then the next property would be just me while my sibling is a tenant in the first.

Currently me and another sibling have the name in there. 

I am seeking a  2 family that is in need of renovation and in a safer area (for sibling that will be transferring to the school with in a year and I would like to provide off campus but student rentable safe housing for sibling and others).

I was just about to start a thread asking why a hard money lender would want to lend to an LLC.I started one a few months back (used Rocket Lawyer) but did it just because I wanted a way my siblings and I could invest together with some family money.Was a bit frustrated on my first deal (still in progress) when our lender refused to go through the LLC.

That amount has to be split with a sibling and I believe will leave them with approximately 700k to which they would owe capitals gains tax (this I knew, they had no idea).So I looked around I found out they could do a 1031 exchange fairly easily.  

Unlike leads you can order online from a generic website, I can guarantee that the leads I pull are fresh (60 days or less), off market, and I use a ranking system to determine which sellers are most motivated based off of factors such as the executor of the property living in a different state and the amount of siblings the house has been inherited by.