Investmenting funds from retirement account in flipping

[Chad White]

Hi Everyone...I found out that one of my parents has substantial funds in a Money Market account that is part of his retirement portfolio. His accountant said he can invest it in ventures other than stocks, bonds, mutual funds....precisely real estate. His accountant said that he cannot invest it with family, or a family members LLC. I am currently borrowing hard money for my flips at 12%. I've done a lot of deals and we're confident that I will be able to pay him back, but we don't know how he can legally invest this money with me in my flips without losing the tax deferred gains that he has in there. Is there a type of corporation that makes sense for me that would allow him to to this? Is his accountant just full of it? Does it make sense for him to just pay the taxes and cash it out now, if I am willing to pay him 10% (so I save 2% plus 3 points). He is is in the highest tax bracket. Currently he is earning 1/10 of a percent on the money in there.