If you want to sell it mate then just sell it , don't have to justify yourself to "Mik the geek" , if his a good mate , good work , get £800 .
£800 A lot of money for you and keeps your workload in a better state .
You'll be less STRESSSED ,
Live to enjoy
Don't live to just work
Since I broke my hand and had 5 weeks off , I now don't worry about work load, target times etc , enjoy life , it can easily change .
You've done the right think , it's worth £300 a month , so get £600 upfront , and £300 when he can
.??