Good points David and Chris.
The spreadsheet idea is very helpful in my experience now that I own multiple properties, it gives a great snapshot quickly to underwriting, it helped me quickly qualify for commercial loans, not as much for conventional.
I also learned to keep everything digital both in REI and my regular business. This way I submit all my docs immediately which leaves the lender totally surprised, but they move it to underwriting immediately.
I recently did multiple refinances in one closing with a lender I had used for 12 previous loans, so I was very familiar with their underwriting process. Unfortunately this last time I had to deal with a new underwriter who asked for explanation s about endless small details, as if he could never be satisfied. After 3 months of fully cooperating with their demands, I got exhausted and told them if I'm not qualified enough by now then let's cancel the whole deal, I'll go with a different lender. At that point they realized they went too far (the processing manager agreed that this underwriter exhausted everyone). So we closed on the loan, but now I'm doing new loans with a different lender - much easier! If a lender gets too difficult to deal with, try another lender, don't waste your time.