'Car boot instruction' is very much frowned upon. You will need to be your own 'RF' to conduct IMC training even though you don't need a licensed aerodrome.
What on earth is 'continuity training' when it's at home?
Differences training - perhaps. Hardly going to pay the bills though.
Dodgy deals in 'part-owned' non-Public Transport CofA aircraft - such things won't take long to attract official attention.
Can't you just get a job with a RF?