Get into the routine of entering them as soon as bills come in or putting the bills in one location, entering them once a month and writing on them that they were entered/paid, then filing them. 

Should I be concerned that the husband has no credit history (I'm wondering if this is indicative of past financial hardship/bankruptcy)? 

Like many (most) businesses it requires an investment of capital; money expenditure for ongoing marketing; management of operating, marketing and professional personnel; keeping accounting records and filing tax returns; established sales practices; constant monitoring of goals, budgets, and productivity; establishment and implementation of operational systems; and providing customer service.  

I think if it's vacant 30 days, then a homeowners or landlord policy will deny any claim filed.

I can’t file until the 21st according to state law.  

In addition to this, my income could not be considered because of a personal bankruptcy filed within the last year.

So I had to file for a dispossessory proceeding, but it was short lived because I received rent from him on the 15th of the July.

I did some digging and they had been operating for a long time and had numerous complaints filed. 

File all receipts in a dedicated Google Drive folder.

I'm wondering if I should give the new owner the entire tenant files or just copies of the leases.