Heloc, brrr rehab costs, waiting period for refi?

[Oscar Chirinos]

Hello guys quick question, if i use a Heloc to finance the BRRR strategy, is it true some helocs do NOT allow you to use the funds for rehab or closings costs, and if they do allow it, is there a waiting period for refinancing out of the loan to move onto the next one? like 6-8 months? i thought a heloc was treated just like cash, i keep reading mixed replies on the forums, im confused =(

thanks so much all!