The purchase was made through an LLC by two friends. It is used as a second home. Is there any forms required on the US side - I believe it has been established that the 8938 is not required as foreign real estate is not a foreign financial asset. There is a checking account, but nothing near $10,000 during 2019. Any other US forms, they will remain US citizens/residents.
Is there any further items I am missing or wrong in my understanding? They paid cash - and had to be interviewed by a few US agency authorities and some Costa Rica authorities also. Both sides seemed sensitive about a "cash transaction".