But I suspect, regardless, the mid-term market is not a place for adding expensive amenities; those folks are typically on a strict budget and staying long term; the budget and often, proximity to the purpose for their visit drives booking decisions.

Visit these groups in person when they meet.  

I'm looking at investing there, will go for a visit soon.

Hello everyone, and thanks ahead of time for your help and advice.   

Does your PM answer inquiries in minutes ahead of all the other properties they manage?

I do maintenance visits every few months until the tenant proves they are trustworthy and with some of mine, it's just once a year now. 

Additionally in comment above, before making any decisions, it might be beneficial to visit the areas and possibly meet with a local realtor or property manager.

@Marius FleischerYou will have 50% of people tell you that you should invest there and 50% say otherwise or provide areas they feel are betterEach area has positives and negatives - my recommendation is to visit each of these areas then shortlist them and continue to figure out where to invest

A goal of making 75k annually from large multifamily is great, but that sounds like a goal that is several goals ahead of where you are.  

In my opinion - no, you cannot establish it as an STR without any booked visits.