I'll be 68 in 4 weeks & retired on my birthday in 2018. We have base Medicare (A & B), an Anthem Medicare Advantage plan (Part G), prescription drug plan (Part D) & separate dental insurance. All in for both of us is $700/mth. I'm not going to discuss the US health system vs East BF country becuase I'm not an expert in either. I look at all of the non-A/B/D Mediare plans similar to the options I had when working: High deductible PPO, Low deductible PPO, etc. Each has it's pros & cons, AND, more importantly cost different amounts. Obviously your choice needs to fit your budget (A lot of people only have the base A & B. We're fortunate to be able to afford more coverage). The med insurance years prior to Medicare can be costly - we had my wife's county/state insurance that didn't increase too much when she retired. That made my 61-65 age years easier financially.
What's important to us is access to medical expertise when we need it. Never had a problem with that body part or that medical condition before you retired? You do now. You better hope there is someone local to treat you. Yes, this has made us pause when talking about moving to a place closer to the ocean/beach and/or a smaller city.
So, retirement. When I retired I thought about doing local consulting with small manufacturing companies (I implemented ERP systems at process manufacturers for ~30 years). Hourly rates were a joke so I dropped that idea after my first interview. I lucked into my new career: catering deliveries for local companies. I'm independant working under my own LLC. So my advice is to find something that you can leverage into making money & establish an LLC. There are a lot of tax advantages including paying those health insurance premiums with pre-tax money. Make money, meet people, get tax benefits.
Financial - in 2016 I turned over all of our IRA accounts to a financial advisor at one of the major finance companies. Upon retirement, we transfered everything there, too. Yes, we pay for it but we're getting a discount because he's someone we know. I managed everything until 2016 and knew I wasn't knowledgeable enough to do it in retirement. Plus I have no desire to keep up with the financial world minutia on a day-day/week-to-week basis. I talk to him quarterly, discuss goals, risks & options and we try to make some money. I've been extremely happy. No way I could have financially navigated these past 6+ years & been successful. A man has to know his limitations.
Travel - we try & take at 2-3 decent vactions per year to the Caribbean or US destination plus several multi-day/overnight trips. As a former Road Warrior I like to play around with frequent flyer, hotel points & credit card points to use for free travel. Having an LLC improves the ability to get more points. I guess you can call it my hobby.
Many of our expenses decreased when we retired -example: my wife used to drive ~9k miles/year when she worked. She drives ~3.5k now.
My advice: If you're close to retiring and can afford it, do it. I have yet to meet anybody who says "Yeah, this retirement thing sucks."