I would consider selling one of the properties, paying off the debt, creating a reserve for your remaining investment, and ensuring you are 100% financially stable before you invest again.

hold for 5 years and sell or hold forever?

Seems like they aren't in a hurry to sell if it's been on the market that long and they have raised the price.

Are there any strategies to sell subject to,s to end buyers?

Maybe a mom & pop owned small multi-family can owner finance or sell to you with some guidance for the transition.

If you are on the fence with the above, then you should sell now as you enter the spring market.

Most desirable areas in Tampa Bay are in AE or higher risk flood zones and generally sell for a premium for a comparable home placed elsewhere - all else equal . 

They want to sell for as much as possible.Use the broker's pro forma as a thumb to the wind guide for your interest along with the rest of the offering memo (right location, asset class, etc.). 

About 1/3 were in limbo--neither rebuilding nor selling, while owners tried to decide what to do--sell, rebuild, or fight with the insurance company--or just didn't have the money to rebuild and didn't want to sell. 

Better sell everything and live in an underground bunker.