If you're using a DSCR loan to purchase the home, most lenders use the lower of the lease agreement or 100% of the market rent from the appraisal form 1007 to determine the DSCR.

Is the higher price agent inflating to get the listing or is the lower price agent just not keyed in well enough in the specific neighborhood?

They lower taxable income for federal taxes but not for FICA.However, employer contributions made by the S-Corp are not subject to FICA and count as a business expense.Make sure your W-2 correctly reports wages, deferrals, and FICA wages.

Depreciation lowers taxable income now but is subject to recapture at a maximum 25% rate when the property is sold.

I was reading up about it, and saw that the cons of oil heating include needing to top up the oil supply, lower efficiency (than gas and electric), and potential leaking of tanks leading to environmental issues.Is anyone familiar with oil heated homes?

My guess solely looking at your numbers is that it's an older/distressed property which means you have to account for more costs in capex. 2nd thought being it's not in the best of neighborhood then you'd have to take into consideration lower quality tenants/ neighbors and maybe increase expected vacancy and late payments.

For a single property, a strong umbrella insurance policy may offer sufficient protection at a lower cost.

Then they lowered the price to $340,000, a step in the right direction, but not as big a step that I liked. 

For example, if I buy a house for $100,000 from a wholesaler that should have a market value of $200,000 after I finish putting in $50,000 to repair the house, then the appraiser and the bank penalized me by giving me a lower loan for getting the house so cheap.

I'm also considering Halethorpe because it's a good commuter location.Some people really like supporting the city in which case , northeast Baltimore would seem to the best place to buy a single family, in my opinion given the taxes situation and given that none of those areas are walkable I’d rather just be in the county and pay Lower taxes, and it’s not like northeast Baltimore is much that much cheaper than Baltimore county, hathorpe is mixed, arbutus is nice, I hate the housing stock there, would rather be in Catonsville if I was considering western Baltimore county.