LornaLou Hi and thank you for your message. My husband is going to to visit me in the UK, for this reason I am looking at going to Chicago to stay with him for almost 3 months after that (as we are allowed with the UK passport), which might not suit you - unless you want to visit USA later on this year. As I am alone here, before doing this step, I have to think what I am going to do with my place in London.
Regarding the travel situation, I think is worth paying attention to the weather in the Caribbean via http://www.weather.com (https://weather.com/en-GB/weather/radar/interactive/l/6121681b2c5df01145b9723d497c595c53ae08104787aa1c26bafdf2fb875c07 for radar) or any similar sites (besides the fact that you cannot enter the USA on the 14th day but as from the 15th day onwards from the Caribbean country for example).
In order to travel cheaply, the best is to book a package holiday with BA (together with another person) when they have their offers: Mexico has lots of cheap places, some islands in the Caribbean (especially those closer to Florida like Bermuda, Cayman etc are more expensive) as opposed to those closer to S America (Barbados etc)
Also read the travel updates as presented on the USA government site for UK https://travel.state.gov/content/travel/en/us-visas/Visa-Reciprocity-and-Civil-Documents-by-Country/UnitedKingdom.html or even https://www.dailymail.com
Is there anyone here having a visa appointment with the USA embassy in London and who had it changed by them several times since March 2020? I would like to know your view on this.