Since I'm a new immigrant with no credit score, a DSCR with 30-35% down payment is my only option, so the 50K need to include that down payment alongside all other costs (closing, rehab, etc). 

Duplexes have less risk:  Mainly because you have less tenant risk (but we will address that on the next paragraph).

I have 4 single family homes rented and rehabing 2 currently, in the pee dee area.

* Are there creative solutions landlords use to address tenant concerns about parking in this area?

They use a credit system where they give free skip tracing for 250 numbers+250 emails+250 email sends (which is nothing) then you are paying .08c for 1 number or email or address.

If not, what would the post-rehab rents be? 

I am an agent in Huntsville and can try to help with the comps if you want to send me the address. 

Now that is taken care of; time to address the renter's insurance.As mentioned by someone above, you can be listed on the policy as insured or interested party.  

Expect to spend another ~$8K for that.If you are planning to close all-cash and bring enough cash with you for operating expenses and rehab, you are looking at a minimum capital raise of about $3M and that is for a cheap 32 unit.

Also SOP for such is individual property owners will, individually, address total site cleanup in concert with there insurance providers.