We do allow a well-trained dog, preferably large, no puppies and no breeds not covered by our insurance (vet records showing breed, age, proof of current vaccination and any required pet license).

Again, costs will be incurred with each property taken as collateral and you will have the release fee requirement as well with a LOC.

What documents do they require, what credit scores do they allow, how do they verify previous rental history, etc.?

For the most part (particularly Fort Lauderdale and Miami) requires permits and inspections of your str. if you operate it without having the permit you can get heavy fines and get shut off.

  #4 requires literally a lifetime of practice and intense preparation. 

What documents do they require, what credit scores do they allow, how do they verify previous rental history, etc.?

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).

Now McDonald's arguably did it better than anyone else due to having that perfect combination of factors (e.g. franchise model, desirable product, global economic growth, etc.).

STR may make more money, but they are a lot more work and require more management.

Now they will require your SSN as the "signer" on the bank account, which would be required by every signer on the account, but the account should be listed under the LLC's EIN, not your SSN.