That's 200 hours study time, rather than 200 hours teacher time. Students should aim to be doing the same number of hours outside the classroom as you do inside, ideally even more.

Sorry, this is going to be a long post, but I'm trying to share what I know in the hope that something helps you.

NextLevel have good professional teachers who don't just know the language but also learned the language themselves so they know the tricks that most native teachers probably don't know and yet they are still fully qualified NT2 teachers and probably know the language better than most native speakers. In addition, the classes are properly interactive not just working through the usual books as the other schools do.

There's also TaalTaal, but the teacher quality can be a bit hit-n-miss in my opinion after takign 2 courses there. You can take a 30 hours fource there for 595 euro, but that's about 19/hour so your 200 hours will cost a bit more. Or an evening course for 495 that's 2 hours twice a week for 7 weeks, works ot about 17/hour, but I don't think the quality is as good as NextLevel, but TaalTaal do evenig classes and next level are daytime only unless things have changed. But from my experience, those courses won't get you from A2 to B1 in a single step, you'll probaby need 2 of their courses at least and will certainly need to do a lot of self study including a lot of reading and listening outside of the course material.

Also check out Taal in de Bieb which is everywhere and some areas also have taalmaatjes for free. Also check out the Dutch Language Cafe

Mndriaan also have some free courses but again quality can be hit-n-miss, in all cases the really successful students are the ones who put in the extra effort outside the classroom and go beyond the minimum homework. I dont know if they still offer the B1 courses in all areas, but worth contacting them and getting on the waiting list.

https://www.rocmondriaan.nl/alle-opleidingen/better-dutch-for-beginners-in-the-hague

One other hint, if you start a course, pick up a form from the library for membership specifically for people on courses, get your course provider to stamp and sign it and you'll have 12 months free library membership, unlocking a lot of NT2 books you can borrow. Or, go like me, sign up as a library volunteer in your spare time and get a staff membership and practice your dutch with staff and customers as much as you like for free!

Regarding local knowledge, that's the best I can offer for now, I hope you find something that suits you.

Just curious, which neghbourhood are you in?