Making an offer with no hard financing plans

[John Ford]

OK, so a deal came on the market within the last 24hrs that I think I may want to make my first as-an-investor offer on. But...I have no liquid funds. Can I make an offer with financing up in the air? Isn't it customary to put the type of financing I expect to use to close the deal in the contract? What if my financing plans are "take out a HELOC which could take 60 days to close and I very well could ultimately be denied for, blowing up the deal." Is it still worth it to submit an offer?

I am working with an investor-friendly agent but I wanted to ask here before I ask them and look like a fool and have them think "this guy has no clue what he's doing" and kicks me to the curb.