I personally think if u concentrate on windows,gutters and conservatories and get your pricing right then you would lose money on some of the handyman jobs you did, I constantly look at ways of improving my round and the odd jobs I used to do are slowly getting dropped as on the glass I can hit between £25-£50 per hour.
Doing it for the variation is understandable but would doubt you could hit the above hourly figure doing it, I charge £20 for odd jobs but only those I can complete within 30 minutes, I am still thinking about gardening as an add on, lawn mowing only but would have my trainee do it to boost his income
Graham