I fear that if I do not use it from the start I will not be able to use it anymore2) Are there good explanations and examples on how to do it properly?

@Nick B.Thank you for explanation Nick

I've read hundreds of these and often have to call the agent for an explanation to ensure we're protected. 

Use of Funds- a one page explanation 2.

They’ll appreciate the explanation and know what type of deals you want to see moving forward.Overall, you can differentiate yourself from other investors by using these methods when speaking to real estate agents.

Thank you for your honesty and detailed explanation.  

Hi Dave, thank you so much for the detail explanation.  

@Storm Silva, I too was hoping for further explanation of "Master Leasing".

They asked for more evidence, receipts, pictures and more pictures, explanations on our cost calculations, etc. 

FHA will allow job gaps with a letter of explanation.