Financing a home with a bomb shelter?

[Nolan M.]

I'm working on a flip that has a bomb shelter. The entrance is in the corner of the house and is a manhole style with ladder rungs going down about 10 feet and the actual shelter is about 100 sqft. My agent has been calling appraisers and lenders and its looking like financing will be an issue because there are no other bomb shelter houses in town that have sold with financing. Town only has about 8K people so I'm sure that doesn't help. Do any lenders or appraisers have an opinion on this?