Hi Justin,additional costs are likely in the rehab process as well....party walls and utilities that I can think of right away.

I think they call it "the hood" because there are mobile homes on my block and it's not water-front, and while mine is a mobile home, it has two additions that make it look like a full sized house.

Depending on your goals for the property and how much underwriting you want to be subjected to - your options are broadly as follows. 1) If the property is habitable and just needs some updates and minor repairs and you would like to keep it as a rental - conforming loans will be the cheapest rate and fees, require full underwriting on you, and your income will be considered to buy the property - think DTI ratio. 2) If the property is not habitable that leaves you with something like a hard money loan or private loan - which are normally short term debt.

Do a search here on Evolve and you will find a ton of info.Also, use VRBO in addition to AirBNB for your comps.

My price range is determined by the amount I'm able to qualify for considering my debt-to-income (DTI) ratio.

If it's a fix and flip SFR or Multi Family, then the DSCR won't ever work, so you'll be relying on the global cash flow of the investors to support the payment, in which case you have to have a good case for that via personal cash flow of the investors, liquidity and/or additional assets to pledge as an abundance of caution.To the question about the LLC's financials on a new entity, for real estate it's a non issue as the asset is what is generating the cash flow to pay back the loan not a new 'business' in the traditional sense.

what should I check in addition to the regular stuff (inspection, contractor walkthrough, etc.)?

This is exactly the question I'm asking, seems self insuring would be a good additional revenue stream and I'm ok with the loss of a cancellation as long as it's the minority. 

Added additional bathroom and office space.

I think it's a good idea to budget for an additional 10% of expenses on top of your initial budget to account for additional unknowns during a rehab.That way it's baked into your numbers.