Starting up as a PAT tester

[waynedear]

I am involved with a small theatre group, they run many courses, writing, producing, directing and acting.
They have recording and podcast facilities.
They will pay for a course, buy a testing unit... I would then do their testing for free and can then use the equipment for any work I can get.
I'm 63, no formal qualifications and struggling to find a job that fits in with what my wife wants and an old dog that needs meds 4 times a day.
Obviously I would have to set myself up and get public liability insurance.
My main question is... Quickbooks... Easy to use and does what it says on the tin ??

[Mr Pointy]

Can you use Excel? It's about all you need. Xero would be another alternative but you'd need to be making enough to make the monthly cost worthwhile.

[Doofus]

I've recently started playing with manager.io

I have no need, nor use, for it, but I'm intrigued. It's free, and not cloud-based (which is what piqued my interest).

ETA: If this thread is about bookkeeping software, it's in the wrong place.