Dougster,
I've been following this thread with great interest, and decided to jump in.
Trying to make a long story short, about 2 years ago I left a government career at age 47 because I just couldn't take the stress and politics anymore.
During the next year, I tried truck driving - something that I always wanted to do, and found that I really didn't like that. But, I got that out of my system now - at least I gave it a try, and know what it is like now.
I've had a lawn mowing business on the side for years, and wanted to give that a go full time to see if I could make it go.
Now, I live in a very rural, poor area, and I knew it was going to be tough to make enough to sustain my household.
Also, last winter, my wife had back surgery, and I needed to be at or near home to help her out - she's been taking care of me all these years, and it is now my turn to take care of her.
So, I jumped ship from the truck, and started advertising to gain more clients.
One of the biggest problems with the mowing, is that my competition works out of the back of an old pickup, does it "on the side", has no liability insurance, and uses old "Wal-Mart Special" equipment. I have myself setup with a Deere Z-Trak (commercial), plus eveything else commercial grade, with of course insurance.
During the course of the past 4 months, knowing well that the mowing alone would not be enough, I've been working on finding other related work. I had a Deere 2210 (sub-compact 4wd diesel) and a brush hog, so started advertising that getting a little more work.
Then I got together with a local excavating contractor, who does not like to do seeding/mulching work, so I am sub-contracting to him for that work. In the meantime, I found that my little 2210 was not quite enough to do this, so I made a great deal on a trade to a Deere 2520 so I could use more implements.
So, in trying to find my "niche" in the market, I've gone from just finish mowing, to brush hogging, to seed/lawn installation. I am now starting to advertise driveway repair using my box blade and rake (did my first job last Tuesday - came out great).
Now to my point....
Like you, I got another offer to go back to work in my old career... this time on a part-time basis. I'll learn more about it next week. Normally, I say flat-out no... but this time I must admit that I am tempted.
Some weeks are certainly scary when the phone doesn't ring. And, beside all the regular household bills, I now have to pay for our health insurance. Plus, the big one, is winter is always knocking on the door, and wonder what I will do to make it through.
So, I was very fortunate to pick up a part time job. It is driving tractor-trailer only on the weekends. I leave Saturday afternoon, and return Sunday afternoon (actually going to Mass from Penna and back). Pays by the hour - prevailing wage.
This has really given me some peace of mind - that little extra income, that is steady, and still lets me persue my business full time.
Leave your options open, but don't give up on the business yet. Maybe try to find some other "niches" as I have to grow your business.