@Daniel Johnson Continuing that discussion, a good strategy I've debated using myself is to budget ~$30k in available funds per house (not including monthly interest payments during the flip). You end up spending about 20k at the beginning, and then you have another 10k to fund the contractors to keep the process quick and smooth.
With proper timing and planning you can pay the contractors, receive the funds from the HML after a few items have been completed, and then fund your contractor for the next round of items with what you just received. If everything goes as planned you'll be able to repeat that through the entire process and keep your contractor happy.
This strategy would also work if you want to act as the GC on your deal. You pay your subcontractors and then Hard Money sends you the funds for the completed items.
Side note: The numbers I'm using come from a 100k purchase & rehab, 150k sales price flip, which is my most common project. The numbers can vary significantly depending on the deal.