For HML, it depends on the lender, but where I am, it's 3-5 points, the cost of the appraisal and survey, insurance and the application fee. Out of pocket could be anywhere from 2000 and up depending on the amount of the loan. For example, I'm about to complete a closing with a HML and my out of pocket is around 4000 for a 86,800 loan. (70% of ARV). Once closing is complete, you'll have to have money upfront for the rehab cost and take draws out after completing the renovations. I plan on doing around 10,000 in repairs with my own money, keep the receipts, the HML sends someone over to verify I have those repairs completed and I get my 10,000 back to do the next set of repairs. To be safe, I like to have 20,000 in cash to do a flip with a HML. Don't forget, you'll also have the money for holding costs: electricity, water, sewage, gas, trash, and the payment for the loan. That's another 1200 a month for 6 months which is the term of the loan, so the faster you can get the rehab done and back on the market, the better off you are. However, a lot of loans have a 90 day seasoning, so you'll have t hold on to the property for a minimum of 3 months.
A investment conventional loan is another option, but then you have to put down 20% of the loan amount, closing costs and then have to have cash for the rehabs. You'll have to have more cash on hand for this scenario.