If you can have a lease lined up for your unit they shouldn't count your current mortgage against you and could use that "potential" income as income on your DTI. 

Would the landlords out there recommend providing extermination service to make tenant happy, or remind her that the home was rodent free at beginning of her lease.

What should I expect and how should vet/set up a lease through a temporary housing company for a tenant?

Also, when it comes to these infrastructure items you are concerned about, learn more about the "options".

A total cost of 6.3Mn over 23 units equates to 274K/unit...this appears unbelievably low for San Diego...I'd want to see full development budget detailing hard, soft and financing costs as well as month by month projections showing construction and lease up cash flows.What's the 2.2Mn purchase price for?

"Cross selling" is _________________:a) When you go to your sales job wearing clothes more typically worn by the opposite gender.b) Just like it sounds: literally selling crucifixes. c) A strategy wherein a business strives to encourage existing customers to purchase adjacent products complementary to an item that the customer has already bought in a prior transaction, or is currently on the verge of purchasing.d) All of the above.

with auto-pay options, automatic late fees, and reminders, lease signing, security deposit collection, etc. 

As for your lease, I'd be careful with what you are doing there.

So he wants all the upside (fully occupied and cash flowing) without any of the work (rehab and lease-up).Like @Tyler Watts said, the math wont work.

These requirements will apply even if you do not have a formal written lease agreement.