If you do use one you may want to speak to a realtor about it to make sure you follow the guidelines so you fill it in correctly and don't put yourself in a position of liability.

@Nathan GreenAs @Charles Seaman indicated there is no set formula here.In my mind, finding and securing a deal might be worth 5% to 10% of the equity.If one works off this 5% to 10% guideline and ASSUMING THE OPERATION WORK LOAD IS SPLIT EVENLY (more on that later), then your 1/3 cash into the deal entitles you to 33% of the equity - allocating 5% to 10% of the equity for finding the deal - adding this to your 33% split based on cash might indicate you should receive 38% to 43% of the deal.

At that point, your gambling, not investing.

I was thinking to "house hack" the property by listing on Airbnb that way I can live in the property to follow FHA guidelines but still produce income.

Your rate will suck and you'll be paying PMI, but from a down payment perspective, you only need 15% down to buy a single-unit investment property with conventional financing under Fannie/Freddie guidelines. 

You probably should not be trying to interpret regulations or guidelines for people and telling them "by following that guidance they will know if it qualifies" because that's not everything to consider here and we're talking about high stakes with regards to mortgage fraud. 

You can get a residential loan non commercial through a bank or mortgage lender however the guidelines are more strict and more based on you the borrower as opposed to being mainly based on the asset and it's potential performance. 

The Homestyle basically copied the 203k guidelines, but repackaged into a conventional loan format.

My lender informed me that since my accountant called my flip income over the last 2 years "capital gain" income, it does not count as income for mortgage qualification purposes (according to federal guidelines???).  

My loan officer just told me that conventional federal guidelines do not allow a gift for a down payment on an investment property.My question is, if I put the gifted money to buy stocks, then sell it and transfer back to my bank account within a week.