Don't wish to join the 'my favourite' Florida flying school (or employer) guys on here but there are some genuine posts and problems.
One problem, in training anywhere, has always been finding out how much it will all really cost to get to the stage when you will have a valid application. They will say how much an hour it will cost for hire and instruction and multiply (by the minimum) to give a cost but..... many omit to mention that you may not make it in the minimum AND all the extras, such as exam fees, medical, landing charges, RT, books, night rating, etc. Another con. is that you can't actually use (booked, not available) the aircraft type which was quoted and cheapest. I prefer the Warrior but it won't be as cheap as a 150. If you go abroad, there will be more 'extras', such as accommodation and transport. Are they included?
Also, the potential problem of not being able to pass in the minimum time or at the first attempt is a common cause of trouble. If you are not on a fixed price package, the school and instructor make more money if you have to take more time to be ready for and 're-sit' exams. That is one reason for course which you thought was £4 k ending-up costing £6 k., before the other extras!
The only answer to the above is that any reputable school will supply a WRITTEN quote of all the costs associated with any of their courses and confirm exactly what is included or extra. If they won't, don't go there, whether the school's in Florida or Farmer Giles' fields nearby.
Some people don't have 3 weeks or £3k for a PPL and it may be cheaper in the Third World but the USA is the sensible choice for most. It is not only the cost but the fact that you can actually get the flying done which makes it so appealing, relative to here.
However, don't assume, or be fooled into believing, it will be easy or pleasant and forget theme parks and parties, until you've finished. Prepare yourself, as far as possible, for plenty of studying and flying. Apart from acting as though they are on holiday, another mistake a few made, or seem to attach great importance to, is the personal side- 'friendly' etc. Remember that they don't choose you or any of their students and, when all is said and done, you are there to accept instruction = do as you are told. The attitude of the owner, CFI or Chairman, as well as other people, is important at any flying club or organisation, but rather irrelevant in a short course. For that, your priority is the true cost and the likelihood of passing. Most estate agents and financial advisers are extremely friendly and attentive, like front men and agents for flying schools, but only because they hope you are another sucker for their slimy selling skills !
Some of the schools abroad are British, which is important as the latest rumour is that others are actually foreign with a token trainer listed by the CAA. However, every school will have some locals and you mustn't assume that Americans will appreciate all your habits or humour. I was told that we are usually dirty (high temperature/humidity requires regular showers and changing into clean clothing) and very mean (don't tip properly). As there have been millions of UK visitors to California and Florida, plenty of people are already bored with Brits. and some, such as Irish Americans, are often 'anti' so, as you come from a distant and minor island, where you have been taught to speak some quaint version of their language, just behave like a humble and polite foreigner, in awe of their aviation and everything else in their country.
Hope the above advice assists.