This includes trips to properties for evaluations, trips to Home Depot, etc. 

The problem is, that's not proper accounting because a credit card is a liability, and doing this workaround will reduce your assets rather than increase your liabilities, which totally messes up your balance sheet and debt-to-income ratios.  

Terms such as interest rates and payment schedules are typically negotiable.Combining creative financing with seller financing can include strategies like:Subject-to and Seller Financing: Taking over the seller's mortgage and financing the equity portion through the seller.Lease Option: Renting with an option to buy while negotiating seller financing for part of the purchase.Wraparound Mortgage: Keeping the seller's existing loan while they finance a new loan that includes the balance.To proceed, consider connecting with experienced investors, understanding local legal implications, and attending networking events to gather insights.

I know that interest on the acquisition loan can be included in the cost basis since it’s inventory.

Do everything right: To include but not limited to pro photos, professional quality design, durable furnishings.  

As a side note, FDIC insurance protects depositor money, not debt.

The higher the flat monthly management fee, the more services it includes. 

Listing your property there ensures visibility.Build Relationships: When agents reach out, respond quickly, highlight your property’s amenities, and showcase your flexibility to meet displaced families’ needs.Highlight Insurance-Friendly Features: Emphasize features like flexible lease terms, utilities included, and a fully furnished setup to attract insurance placements.This approach has helped me successfully market to insurance companies.

We have no debt and good credit scores, do we have any options for making this work?

There are plenty of older homes on the market that do not have closets.You need 2 egresses (including 1 that goes outside) such as a door or window, size about 70sqft (local codes may differ), ceilings at least 7ft high, and it cannot be a walk-through passage.As always, your local codes may be different.