I'm only an aspiring fighter.
I have a "real" job very part time, one or two days a week. I had a fairly lucrative full time job, but I quit that because of how much it was hindering my training.
To make end's meet, I'm living as meagerly as I can, cutting out any expenses that aren't necessary for me right now. I'm even back living at home for the time.
I think there comes a time when you have to cut your losses. So, I'm fighting in March, and if that doesn't play well for me, it's done for me, sadly. If it doesn't work out then, then I'll be looking for a more sincere part time job and going back to school, or simply finding a full time job to work.
If I could train full time, I would undoubtedly go after it.