Sounds like a great Win-Win choice!
I trained during the late eighties airline recession, and tried to support a family on a flying instructor's pittance for years.
Many students at the school had "proper" jobs and just trained on days off and holidays, all the way to ATPL.
The only career difference that I have seen subsequently, is that those who didn't throw themselves in at the deep-end took a little longer to get their commands. (Perhaps this is a statistical illusion, or perhaps those with the commitment to risk it all and live on nothing for a few years actually do have more drive and commitment?)
The lifestyle difference however was enormous, since they still had well paid and secure jobs, the bills were paid, the families were well fed, and no hiding from the rent-man.
I don't have a crystal ball, but if you can keep the day-job going and borrow the cash (at todays low rates) then why not?
Things are quite pleasant for those of us with a current 737 rating at the moment, but desperate for the unfortunate (and well qualified) many who haven't. Clearing that backlog of pilots ahead of you may take some time...