WQ, as far as budgeting per month, it doesn't really bother me too much, it is doable but it is very optimistic and you won't have much chance to relax and unwind which leaves you feeling left out of your course. But if you'd be unable to afford to fund your own type rating and you know this for a fact now, why are you forging ahead with the course?! You will have a strong probability of going somewhere where paying your own TR will be necessary, and you'll feel rpetty hacked off when you end up unemployed because you relied on getting a job where you didn't pay for it!
Seriously, it's not a good time to start training, the time is actually NOT now or never, it's more than likely NEXT year or never. You could always get a job, earn money so you can boost your savings then going onto the course when you see the industry is at the beginning of the upslope? Look at the past troughs in the industry. How long until the airlines recovered? Planning is key.
Also yes, up till now employment at OAA has pretty much been as strong and positive as ever. What about over the next six months? Are you going to bet that they'll stay linear?!