Can you and your SDIRA buy together??

[Rick Pozos]

I was just reading another post  and someone said that you can NOT buy along with a family member's sdira. I was under the impression that you could, but not sell to or buy from. 

I know that I can not sell a property to my parent's sdira or their sdira can not sell me a house. 

Can my parent's sdira put up 50% of the cash and I put up 50% of the cash and we buy the house in both our names (parents sdira and rick pozos)???