@Peter Schuyler, I don't know if this is the right way of looking at it, since I am still working on landing my first deal. This is for fix and flip, buy and hold would be a little different. After analyzing about 20-30 deals (just using formulas others have created), I have determined that I want to make $20-$25K profit. So I am looking at houses that I can buy that fit the formula: OfferPrice= ARV- RehabCosts-HoldingCosts-PurchaseCosts-SellingCosts-Profit. I have determined that for the houses I am looking at (ARV $120K-$200K) and the financing I need that I will need between 15K-30K to buy and hold property; that includes down payment and holding costs.
I have about 40K to invest, so to start I can only do one deal. Once I finish that deal I will have 65K (my starting capital + my profit) if everything goes to plan. That should allow me to buy two deals, after those two sell I should have around 110K, that will allow me to buy 3 or 4, etc. My goal is to get to flipping 2 properties a month.
I hope that makes sense. Have a plan and stick to it. Don't chase the numbers, the first deal is critical to set the plan in motion. Take your time with that one!