She had checked out good, job & credit wise, but had personal issues that you can't screen for.

I feel that the taxes might be the issue.  

I've been using it for the past 3 months and haven't had hardly any issue finding the owner.

I've had some appraisal issues getting loans done when they aren't legal. 

I am thinking this issue may creep into my area as well in the future.  

The issue is the girlfriend and I will be quitting our jobs come January and traveling abroad for 4-5 months in SE asia/ NZ, to teach CPR and basic medical training (Volunteering). 

Any weather issues I need to be aware of?  

According to 1760.03 new Toledo Lead Ordinance, Obtaining a "Lead-Safe Certificate", the Certificate is transferable:(c) Upon the sale, purchase, or transfer of ownership of Residential Rental Property or Family Child Care Home constructed prior to 1978 and which is subject to this Chapter, the Director of the Toledo Lucas County Health Department shall issue an updated “Lead-Safe Certificate” in the name of the new Owner, upon application.

That might be the issue now that I'm looking at it.

As long as tenants are paying utilities and the crawl space has no moisture or mold issues there is no reason to change.