Personally, I would do the research first, get all the answers confirmed and then look into the market to do a deal.  

A true DSCR product doesn’t care about your personal debt. 

Both of this will likely require real time conversations which will be difficult from India3) Maintenance when tenants are staying - I feel less worried about this as I can have the tenant coordinate with my chosen vendor (that I already have or can potentially find from India by talking to them on phone at night time in India / morning in the US).

If one person stops paying and it's tolerated, It's more likely to spread within the house.

@Joseph MuleroTo boost your rent plan and make more money in the medium-length rent market, think about these steps: slowly add furniture to the new place while you stay in your current home, pick cheap furniture, use a credit card with good terms, look into loan options like personal loans or home equity credit lines, try out the market by listing the place with few furniture pieces, aim for easy-to-change furniture for flexibility, and talk to pros like real estate agents or home decorators.

Both of this will likely require real time conversations which will be difficult from India3) Maintenance when tenants are staying - I feel less worried about this as I can have the tenant coordinate with my chosen vendor (that I already have or can potentially find from India by talking to them on phone at night time in India / morning in the US).

Well, you've chosen arguably one of the most desirable places to live on the planet, so it's not surprising it's so expensive. 

I personally don’t want to use FHA. 

Q3: My personal rentals have not, but I bought in Lawton, OK because that was my duty station.

The person you mentioned has no formal credit background.