Would anyone care to recommend a bank, credit union, etc that will do a HELOC on an investment property?

Together we make about 120k-ish and as were doing this, were actively paying down our credit card debt which together is about 20k at the moment, just fyi.I feel like this is a solid plan, but I'm not too big headed to admit that I don't know everything.

I would suggest looking at commercial banks or credit unions in the area to see if this is available. 

So is this just as simple as showing how much the property makes or do they also look at personal debt to income, credit score, reserves etc as well.

With the proceeds we later purchased two properties the same month, one with FHA loan 5% down and received a closing credit of $8k plus a $2k check made out to us after closing.

Also, would this loan help build my personal credit, or would it only report to business credit bureaus under my LLC?

If the inspection reveals a bigger problem, either you can try to keep the deal alive by offering a seller credit, which could motivate the buyer to move forward, or the buyer walks away. 

My father took out a $320K home equity line of credit (HELOC) to invest with my brother and I.

@Iris Olivas Most local banks/credit unions can do this deal with lower fees and potentially rates than brokers.

Not much if any attention is paid to the guarantors, credit, income, etc.