Sorry this is an EPIC, complicated tale.
and
for anyone who perseveres!
I'm breaking this into two posts, one setting the background and the other to outline the current issues.
PART ONE 
A few years BC, I developed a part time hobby business in my qualified area and worked part-time PAYE in a different field. Both roles were social/community orientated and together, were my way of returning to work having been signed off for about a year recovering from burn-out. This had occurred through intense family tragedy and caring commitments of a family member with a serious long term illness, who relied on me for a great deal for support due to bad experiences with their care (serious complaint, judicial review in our favour). I had full support from my DP & Dr and my PAYE work enabled me to make some good out of the tragedy my family had been through.
I folded the hobby business when DC came along and developed the PAYE role further, with on the job training. After a while however, I gave up my job due to both mine and DP's overlapping requirements to work away more and more, together with a period of more intense caring issues.
I am now keen to return to work after a total of 3 years SAHMing, and here is where I need the wonderful advice and support of the lovely MNrs.
Returning to my old job, even freelance, is out. Too intense and emotionally draining and I need a fresh start and ideally gradual re-entry. I may return at some stage, as I still feel I have something to contribute.
So I'm looking at my original area (linked to hobby business) which is competitive at the best of times. I looked at this last year and submitted a project idea to an authority in the field. This was initially to gauge potential and source support and contacts. It got passed around with all positive feedback and I was invited to submit an expression of interest for start-up funding, which was unexpected and really encouraging.
The project concept is pretty unique, has scope to develop and is an area I am passionate about. It will also be likely to be part time. However, I wasn't able to progress at the time (due to health & caring issues) but it may be possible now, if it weren't for several ishoos....
Part Two to follow!