Another consideration is that Thailand is generally easier to get to with far more flights that are often cheaper, and Thailand also has FAR more beach options because of its long southern coastline and especially the islands. The posh beach areas on Phuket are typically the most expensive beach hotels in Thailand, but there are other more remote beaches in Phuket with lower prices so it’s worth a look. Aside from Phuket you should also look at Ko Samui, Ko Pha Ngan, and Ko Phi Phi. You might also look at the town of Pattaya, which is the closest beach resort to the Bangkok Airport. Parts of town have a lot of single foreign men in certain bars at night, but most of the town is actually quite family friendly and very good value. Let me know if you have other questions. -Roger
Like so many others on this list, Goa is completely done with its harsh rainy season by the time November begins, yet crowds don't really start showing up in earnest until mid December. If you have the time off then you'd be very happy just finding a cheap hotel in one of Goa's beach towns and just chilling the whole month in great weather and with minimal crowds.
I think Spain is probably your best bet, and you can probably get there on a reasonably priced flight with a change in Dubai or Abu Dhabi. The winter weather is decent and the big cities are always packed with locals rather than so many tourists. Barcelona is probably more fun than Madrid, though both are big cities with a lot to see and notoriously good nightlife. If you get a cheap enough flight I don’t think you need to do a package. It’s pretty easy to get around Spain’s big cities just on English, as long as you do a bit of research. In 5 days you could spend 3 days in Barcelona and then 2 days in Madrid, or just 5 days in the Barcelona area. It’s a big city with plenty to see and some good day trips. You could also go to Valencia, which is also really fun and a short train ride away.
Southeast Asia is easier to deal with, and there are cheap flights connecting in the Middle East and landing in Bangkok, Kuala Lumpur, and Singapore. Each of those is a very interesting city, and there are many smaller places to go in the same region. In Malaysia there is Penang and Melaka. In Thailand there is Chiang Mai and quite a few others in that area. In Laos you can visit Luang Prabang, which sounds like it could be a winner for you. And there is also Siem Reap, which is home to the amazing Angkor Wat temple complex.