RE is really a small business and the number 1 reason that small business's fail is lack of proper capitalization..

You cannot maintain a business with negative cashflow. 

If they are too busy or too lazy to answer a call or send a short email, what else are they too busy for?

Loan officers with 25 years of experience typically are more experienced, and have less time per file, because they have an abundance of files.Loan officers with 25 months of experience typically are less experienced, but have more time to devote to you.I can't write my own loans, so when I'm getting a loan I prefer working with less busy people when I'm doing my own real estate investment, they're more responsive and dedicated it feels like.

- The market is in a little bit of a lull right now (buyers market), its a great time to buy, but slower time to sell (my primary business is flipping houses) I can supplement my flipping business by providing project management services/consulting, helping investors find discounted properties, etc. etc.

and they're difficult to do, because you're up against businesses that do nothing but flip and BRRRR, and here you come along wanting to do 1 home run right out of the gate. 

Flipping is a production business.

I don't have any specifics but as someone who is into tech, accounting/finance, and a consultant to grow businesses.

Be honest with them if that is what you are doing though so you don't waste their time if they are busy.

You’re running a business not a charity after all.