If I were to purchase an Airstream to use as lodging while I travel across the US to my rental properties, make repairs, and perform lease turnovers, would I be able to not only deduct fuel and campground costs but also depreciate the purchase price across 5 years? 

Purchase price: $499,990 5 bed 3 bath split level house in Hyattsville, 1875 sq ft

Hey Jeff without knowing any details everything is what you are able negotiate. but you have to take in account the years interest rate and purchase price and what kind of cash flow.I will say get a mentor if you’re inexperienced these kind of deals can go left if you really have little knowledge when it comes to structure .

With more sellers than buyers, prices will fall until equilibrium is reached.

I'd price out different layouts and find someone like an architect who specializes in this. 

Start researching price to rent ratios in areas and see which area has the best combination of cash flow/place you want to live!

I have yet to find another rental property for pricing comparison that isn’t an unfair apples to oranges comparison.

Purchase price: $1,500,000 Cash invested: $35,000 4-Unit building in Wicker Park, Chicago. 3-unit front building with a duplex up and a back brick coach house.

Purchase price: $35,000 Cash invested: $38,000 Another flip ready in the market. https://www.zillow.com/homedetails/4467-Sims-St-Columbus-GA-31907/76572533_zpid/

@JD Martin agree 10,000%What I am surprised about is I had a call with someone in Austin today and in sw Florida and they both said things are awful and prices are dropping at high rates - curious don't hear as much chatter here about that as it could be an opportunity