Kids education is not a recurrent remuneration. It's paid towards your receipt and it covers about 75 % of the cost.
5 K is correct for productivity and per diem.
Expect 19 K per month and when you add the 13 month you can more or less plan your life on 20 K per month on average. A good idea is to save 2000 of these for your taxes.
So you'll end up with 18000 to spend. If you're lucky there might be a bonus next year but don't count on it.
Unfortunately 40-50 hours does not mean 15 days at home. There are many COP:s where half of the flying is unpaid positioning. You can also end up with a five day layover in some places. 10 day trips with 15 hours flying is not uncommon. Expect 12-13 days at home on average with the occasional 8 day months as well.
Fixed rosters for three month? Where did you get that from? Your roster is not fixed for three minutes! Expect constant roster changes with the subsequent days off being changed as well. You should have one block of six days that are fixed every month but the rest of the month will be changed with very little notice. You better have a understanding wife when you leave home for a 6 day trip and come home after 14 days and all her dinner plans with your friends was screwed up for the 10th time that year.
Why would one want any other aircraft type? It's the 747-400! Well ok, the -8 would be nice...
They are constantly short of trainers so getting a job as LIP is highly possible after a year or two.
I'm too old for the LoL so I'm not sure about that one.
As Arkdriver says, if you want to have a good medical cover you must take a personal insurance for your family. Expect to pay at least 5000 SGD per year. Nothing covered for the family for dental and for you the company pays up to 400 SGD per year. Won't cover much.
The annual leave ticket is subject to tax and airport fees so it will cost you 3-400 SGD per family member.
Staff travel is the worst in the industry. For regional travel the budget carriers are cheaper and you get a confirmed seat. For travel to the US or Europe you'll pay 1000-1200 SGD per person for a non confirmed ticket. Economy class is often full and they won't upgrade you even if business is empty so unless you can confirm the flight is open you're often better off buying a firm ticket for those flights as well.
The 32 days leave can be split up in fewer days. You can leave Singapore but must ALWAYS ask permission (which will be granted).
You might not be worried about getting a job on the -400 anywhere else but it might be painful for the family to move. That's the problem with the contract job.