Have you considered doing a 203k so that the repair funds are wrapped into the loan? 

., they will get a pay off from your lender and disburse funds to them from the sales proceeds....you never see or receive that money.

There are some limitations compared to 'borrowing' from a SOLO401K, but it does let you put 100% (or close) of your funds to work. 

The plan currently is to fund this flip (price at foreclosure sale + reno) by private money at a 10% interest rate with no payments until closing, after the flip.I looked through all the contracts available here on BP and none of them seemed like the right fit. 

Most new investors I am gathering have the same issue - they have learned about how to make a deal but don't have the funds.

Every market is completely unique and the prices for materials, labor, permits, etc... will vary somewhat from place to place, so you're probably not going to get a really precise answer on this one, but I'll try to point you in the right direction.The number 1 rule is spend less than what you can sell for, while still having a marketable and desirable property that will generate a profit. 

Any feedback on how you started out with low funds is appreciated. 

In order to do that I must organize my finances and wondered if anyone had a great excel spreadsheet they can recommend to begin creating and daily & monthly budget with the goal of maximizing my savings to have the funds for a down payment.

He might have some incite as to whether it would be worth it or not to do this.Conversely a strategy that might yield better results is doing a cash out refinance on the property and using the funds to buy some rental units.

I believe you could use the funds to make a much better investment.