Some experience but first flip questions

[Richard Slade]

so I own a couple long term rental properties but I am working with a partner in my first flip.  Are experienced flippers borrowing money to buy and renovate the properties?  I'm in a situation where I have money or could borrow and I'm struggling to see the benefits of borrowing cash for this process.. Isn't one of the biggest dangers and expenses the potential to not sell in the time frame you planned for and end up paying high interest on borrowed money?  Besides underestimating your repair costs or overestimating your sale price, is this not the biggest danger?  If someone has the cash to do it without borrowing are there any good reasons to borrow?  Especially being new to flips it seems using cash helps give some wiggle room for other mistakes?