I've used the search feature on this forum but didn't have much luck.Are there any US investors, hard money lenders, or groups that invest in flips outside of the United States, specifically in Europe (Netherlands, Spain, etc.)?

Most if not all of these properties require SIGNIFICANT cap ex rehabs and conventional financing won't touch them; you'd likely need to go the hard money route at 10-12%, 2 points, 12-18mon turn around.

or, do you cash flow only after you've set aside money for capex and other items? 

You can get more money on either of those avenues..

All the while you could instead be putting that money into a new property (or properties) more quickly.

Looking to hire a professional to help with my taxes this year, i've always done them myself but fear I'm leaving money on the table.

Both of the members of the LLC we are hoping to do the cash out refinance for are also LLCs if that matters, so it would be distributed from one LLC to another LLC to hopefully the members pockets.Want to make sure that the money remains tax free the whole way and we don't have any surprises. 

But the banks pocket that money.

They could make more money working part-time at McDonald's.I think construction is one of the best opportunities if you can find the time.

Then keep the speed of money & time moving to make more money in the end.