As a wholesaler, it is crucial that you are accurate with your ARV value and your rehab estimate. As Jason mentioned, you have left out many necessary expenses for the rehab. The work mentioned is not everything that will need to be done. Next, if this will be sold to a buy and holder, then the rehab will be at a certain quality, if to a flipper who intends to retail it to an owner occupant, then a higher standard rehab is necessary. Take either exit into consideration.
Get that ARV range narrowed and pegged to a medium number (not best case scenario for your wholesale buyer). Then peg your rehab within a few thousand dollars. There is nothing more frustrating than a wholesaler stating a rehab is $15k, then you get there and realize the rehab is $30k! There is also nothing more frustrating than receiving an ARV of $120k when in fact, it is only $100k!
Do your homework first. Then, when you have the actual spread (equity), you can base your wholesale profit fee off of that, not just some random number of cash you "want" to make. The deal must be good enough to attract your buyer. Your expected profit of $10k for a home at under $50k is quite optomistic at best. If the market will bear such a high price, then great for you, but my guess is that the deal will not work for a buyer with such high mark-up.
I get $10k fees on homes with profit margins of $80k-$100k where the ARV values are in excess of $300k. This example is only to allow you to be more realistic in your expectations, however, I do not know your market or its conditions, so I could be off some.