Do not be judgmental, dont tell him he is disgusting, but talk about makeing sure carpets are cleaned etc.Also, MAKE SURE you learn your state rules. 

Fixing up the interior should be around $5K to $7K for carpet and paint, and cleaning. 

I do have some questions about it but I'll cover those elsewhere; I don't want to clutter up this post with that.Am I correct in understanding that if I decide that a house needs, say, paint inside & out, carpets, a new dishwasher and over-the-range microwave, a runny faucet fixed, and moderate landscaping work, I can't do any of that myself, and also can't hire contractors to do it, but must  hire a General Contractor to manage all the work?

When we found this deal, there was apparant damage to the carpets in the basement from pet waste, which I immediately thought was an excellent opportunity to get into this house as I was willing to spend some time and money rehabing, where most homebuyers wouldn't be.

The one couple even steam cleaned the carpets.

@James Galla hopefully I understand this right so are you saying if you set aside 20k for a rental property that you bought and say you need to replace the carpet and it cost 2k you would take this expense out of your income from the property in a gradual manner to replace those funds but not explicitly continue to take out money once those funds have been replaced because over time this would become disporportional. 

She left some junk, never returned my keys, and left the house a little messy.

My husband is an electrician now and use to lay carpet when we first met.

Repaint (make it a shade of grey), get rid of any carpeting, put down luxury vinyl laminate flooring. 

replaced the heating system to include central air. replace the carpeting with hard wood floors What was the outcome?