I even asked several tenants to move out since they don't keep apartments very clean. 

Then, if needed, send in a cleaning crew before allowing new people to move in. 

Wait until the current tenants leave, then you can clean it and show it.I normally show occupied rentals but we need to follow the rules and play the game, even if it costs us a little.

I can certainly see why a lender would prefer to go for someone with a squeaky clean history.  

Accordingly, at the Tenant’s sole cost, risk, and expense, the Tenant herewith agrees to be responsible for replacement of the air filter (or, cleaning if the filter is a “reusable” or “washable” type of air filter) not less than every six months from the commencement date of the tenancy.

In my experience, Sec 8 is a good source of income as long as your tenants know the rules and are given a clean place if you give them a dirty place your setting the standard for them.

For instance, you will likely need to do some level of clean-up, painting, and minor repairs, all of which have a cost prior to the new tenants moving in. 

Clean it up and make it rent ready.

Hi Greg, thanks for the feed back, and yes you are right, now I'm  not a professional landlord, but I've had 2 other properties there one of which I still own one and I also didn't have any problems placing tenants, the principal of the high school there has been living in the one I currently own there for 2 years now, the work being done is pretty much a total remodel kitchen cabinets, bathrooms remodels,replace the sheetroock in one of the bedrooms re-texture the walls, get rid of a gas fireplace, new flooring, painting interior and exterior light fixtures and add a central heat and air and is a 1300 sf 3/2.The people who lived there were just not clean at all and they just didn't care for the property. 

What seems cold and harsh now may seem the only realistic alternative in a few months.