A great lender can help you calculate and understand your numbers and also guide you on how to improve your DTI by doing things like working to pay down other debt, car payments, etc. 

And yea I currently have a job as a car salesmen and I am reselling on eBay and I am also trying to start up an agency, I am trying to make as much as possible.

.- PITI, sewer/water taxes = $842.00/month- 1,008 sq. feet + 249 sq. feet on lower-level. 2 beds, 1.5 baths, fully finished lower, fenced yard, 4-car off-street parking, dead-end street, 15 minutes from route 495 to Boston, 15 minutes into Providence.- Electric heat.

Like @Nathan Gesner said run an ozone machine, and you can purchase specific odor neutralizer sprays like car companies use.

You then get your brokerage set up with whichever realtor board you want (most likely CAR). 

I said to myself, "You know what, $200 covers my car payment every month!

I've received an offer that I must decide on by Friday for an engineering job.

Furthermore, I would also suggest scheduling a structural engineer to assess the frame and foundation of the property.

I also use the bing search engine.

Driving for dollars,advertising on social media,attending local rei meetups,word of mouth.If you have some funds to invest you can use bandit signs,car advertisement such as magnets,check your local county for a tax list,propstream or even deal machine.