Cost of Living in Puerto Rico in 2020

Food - I pay about same amount as in USA.
Gas I think is little bit more expensive, but not that much I would feel it.
No public transportation really here. I mean it exists but not realistically.
Uber - depends.
No parking fees - if I don't count the homeless who demand to "watch" my car here and there (that's big advantage - no parking fees (except one place - and thats a 1$ 🤪) thought not easy to find parking generally.
Cigarettes are cheap here.
The tolls cost me about 40$ per week.
Two bedroom costs as one bedroom in usa.
(But then you also have paycheck according that...)
Unexpected items - exterminator my newest place got rat, owner doesn't seem to be able to do much about it for past few months, so I will have to find exterminator, car I just got back from mechanic and he drove it, I could start it easily at his place - battery was dead next day morning.. 150$... random things.

Cost of housing depends on what part of the island, how close to the beach and how many luxuries you want.  I bought a comfortable mountain top home with an ocean view, updated the 2/1 main floor, 2/1 cabana, added pool, paid cash at about 1/3 of what it would have cost in Dallas and property taxes saved thousands a year moving here.  Property insurance is running about 1/3 the cost too.   Electricity is higher per kilowatt but runs about the same per month if using all LED, low consumption appliances. It is prone to failure so have a LP generator for back-up that powers the well & other home necessities.
The phone, internet run about the same monthly but trash is free.   Would consider solar but haven't done that yet.   
The roads are varied, winding & very narrow in places, pot-holed in many so I choose to drive a bomber because liability insurance & tags are so cheap and having full coverage to insure a good car doesn't make sense to me here.  No pubic transportation.  Gas is about the same.  Get a home with at least parking spaces for a car. 
Doctors, dentist have not needed yet.  I have private insurance and Medicare but haven't used it here.  I am way past needing childcare so no info for you there.
Shopping is decent.  Weather is great.  Spanish is challenging me but can get by with just English.  The people are the best.  It is so easy to make good friends here.