What to do? Options

[Taxiwardance]

I need some opinions. I started my current job about 4 months ago making “ok” money and working 9am-6pm, 40 hours a week. This was a step down from my carpet cleaning days making quite a bit more but working anywhere from 50-70 hours a week. I have been just squeezing by with the lower salary but I get to see my family more. Now I’m faced with a dilemma. I have a job offer waiting where I could pretty much double my current salary doing nothing but driving around delivering crap door to door. Now there’s 2 catches. Number 1 - I would have to work 5 or 6 (optional) days a week from 9am to around 10pm so the hours are going to suck. Number 2 - after a month my “guaranteed pay” goes to strictly commission so I will never know exactly what I will make the next week. But even with the lowest I would probably ever make I will still never bring home less than 100-150$ more per week than my current job.
Now if you were in this situation what would you do? My old lady just had our daughter on the 23rd and I have a 6 year old son, so things are a bit more screwed up right now than normal. Every time I make a decision I convince myself otherwise and I’m just kind of wondering what anyone else might think. Also the job I am currently working at has spent the last 4 months training me to replace the “old fart” that works there now. And although I don’t have much of a heart I would feel like a real dick to tell them there SOL, but at best I could get a 2$ an hour raise which would still put me 5k below what I made last year!